The reasons are different for each term, I think but there are a couple common problems they have for me.
One problem is that nobody seems to be able to define these terms adequately or in a way that makes any sense to me. Much of the discussions around those terms presuppose one accepts substance dualism, and I do not. I don't believe "spiritual" or "consciousness" is a thing in the sense that people use it in conversation.
Another problem is a bit silly, but I've had more exposure than I'd like to New Age psychobabble. They love words like "spiritual" and "consciousness" and weird boxcar phrases like "enlightened spiritual ascension" and "higher spiritual consciousness." Even typing that out just now makes me twitch hard inside. The terms are often used in speciesist, anthropocentric, exceptionalist, or hierarchical narratives as well, so I developed a dislike for the words.