At least for me, as someone with messed up joints, it's less that it's boring, but more an accessibility/physical discomfort thing personally. It also is another not terribly costly thing to implement as an option. If for whatever reason it did feel core/important to have the player get that clear feedback of pushing a button and seeing gun go boom, that hold to fire might somehow feel inadequate, then I think to support that the right design path would probably not be a rapid-fire machine gun you need to shoot a bunch vs something you do slightly less often and is a little bit more impactful. Just some food for thought :)