If we call our actions "choices," then sure. Again, though, I think there has to be an established idea of what the "choosing self" is before we can talk about whether actions are choices or not.
I don't think we have to decide what exactly the nature of the self is to say that we could do other than what we do.
I think that depends on what one defines as "control." I'm not merely arguing that external circumstances absolutely restrict our ability to choose; I'm arguing that the very notion of a free, choosing agent implies some degree of separation of our concepts of self from our biological constitution and from natural laws.
And I would dispute that contention. I would argue that we can understand ourselves as biological creatures contained by nature/physics in a variety of ways, but that within that sandbox we have genuine choices, ie decisions we can make between more than one viable action.
If the experience of the self is merely a product of biology and natural laws, then the supposed agent we're talking about is simply the result of natural processes in action—be they random or deterministic.
There is a third way aside from randomness and determinism: choice. The choices we make as moral agents have causal power in shaping who we are.
Not necessarily: knowing someone's intent has predictive value about their future actions as well as the most suitable approach to limit or prevent further harm, so its usefulness doesn't have to be connected to some notion of moral accountability. Someone who intentionally kills another person has demonstrated a particularly malignant and dangerous tendency, whereas someone who inadvertently runs another person over may be a reckless driver but not an intentional murderer. Addressing each of the actors in these two scenarios would therefore require different approaches.
Yet that doesn't universally work. At times unintentional killing is also indicative of a future pattern of harmful behavior. Yet I'm willing to bet you'd still want the intentional murderer to serve a more severe sentence than the reckless driver, even if they only ever kill the same number of people.
I see this as connected to my above point about the self and its emergent nature. If we offer a dolphin dog food and a fish, it will most likely "choose" the fish, but why did it do so? Does that exercise in opting for one option out of two possible alternatives imply that the dolphin has free will? It intended some action, but why it intended it is a different story. It's merely expressing its nature and the effect of natural laws on its functioning.
Perhaps this may be helpful to you: agency is part of our nature as well. Something being "our nature" does not necessarily mean we exercise no control over it.
A quote I cited earlier on in this thread was, "I can do as I wish, but I cannot wish as I wish." For example, the thoughts that we have drive our actions and plans, yet we can't make ourselves want to do something on demand or choose exactly what makes us have specific thoughts at specific times. You and I can't make ourselves believe that the Earth is flat on demand, nor can we will ourselves into desiring to eat roaches. A lot of what humans do and think is a product of nature interacting with our bodies, as I said above, even though it certainly feels quite elaborate and sophisticated in general.
It's certainly true that we don't have control over a lot of what we think and feel, especially in the moment. Yet we also know that choices we make actually do impact, in a more indirect, long-term way, how we think and feel. This is the basis, for example, of quite a few interventions to improve various mental health symptoms like depression or anxiety. We are not just helpless slaves of our feelings. We have the power to shape our minds. Not unlimited power, but some.
The reactions are not the result of a conscious choice either; they're bound by natural processes and a manifestation of both our biology and psychology. I don't have anger issues, but I didn't "choose" this. It's just a result of my natural disposition and practice of certain techniques that I encountered. I didn't just will myself into being this way, nor did John Doe who rages at every little thing will himself into being that way—and in order for him to address the anger issues, he would have to undergo a treatment plan that also addressed cause and effect by teaching him how to cope and react to anger.
Much of the treatment plan around addressing John's anger is going to revolve around John making different choices when feelings of anger arise. These choices develop, over time, into habits that can literally make John less prone to anger.