There are a narrow set of circumstances during which a fighter can't attack, most of which are treated as conditions and have rules about them.
However, you are saying that there are a huge number of circumstances in which a feature can't be used and are refusing to even think about any sort of way that it could be, because of Reasons. It's the equivalent of you saying that a fighter who is conscious, standing up, completely unhindered by any physical restraints of any sort, and has a weapon in hand, just can't fight during the day because you have decided that the sun must always be in their eyes, therefore blinding them