Salam
Some people feel faith or lack of it is not a choice. I think it's not in a vacuum.
Do we want there to be a next world or do we want this life to be the only life?
An advantage in this being the only life, is that you don't worry for moral accountability for your actions.
An advantage in being a next world is that you do worry for moral accountability for your actions.
There are a few serious problems with the above.
First, the definitions of the terms. "Faith" has several meanings, but you seem to be using it with the specific meaning of "belief in the existence of a paradise and/or a hell after death".
By that perspective, what you call faith is not a choice; it is, instead, a form of emotional, mental and/or epistemological harm.
Beyond that, you are committing a common but serious mistake: you are taking for granted that those beliefs are useful or even necessary to sustain moral behavior and perhaps moral mentality as well.
The very opposite is true.
It is not very clear whether you consider those beliefs to be voluntary (they mostly are not, IMO). You talk about advantages, but we must not forget that there is no true choice of whether there will be an afterlife involved - let alone a reward/punishment oriented afterlife.
Did I just contradict myself? No. They are both advantages but for a different part of you respectively. For lower self or for higher self. For animal self or for spiritual reality part of you.
Don't assume that belief in Allah, Jannah ("paradise") and/or Jahannam ("hell") are indicators of spirituality. They are just beliefs - and not very refined nor very constructive from a religious perspective, at that.
There is also other factors. Sometimes we want to sin, then don't want to be wrong, we want the act to be okay or even good, and as the only religion with proof condemns it, so we avoid to seek the proof for religion and instead create our own morals or choose a religion based on what we desire out of caprice.
Sorry, those are just not functional understandings of the meaning of those words. If that is religion, then religion is an unworthy thing that serves only to misguide believers.
It is interesting that you talk about "wanting to sin". That is a bit odd to me. Apparently you use a conception of sin that is a consequence of unhealthy desires, as opposed to lack of wisdon and proper awareness of the consequences of our actions.
As for creating our own morals... that is indeed necessary. Each of us people must take responsibility for our own morals. If we do not, then we are being little more than taught animals.
Obedience is not religiosity.