It is not abuse to take advantage of something using solely what the game gives you naturally. ie, it is not abuse to heal through an enrage (T2), use mechanics in a unique way (having your MT dive into conflags in T5 wasn't intended, but they're fine with that too), or find an alternate method of handling moves (using LOS on T6's Devour instead of hiding in briars, or quadruple stacking Renauds in T7 to make Cursed Voice/Shriek trivial). Full stop. People who claim these are abusive methods are coming from a place of absurdity, and seemingly have nothing to back their arguments beyond some claim to purism that S-E itself actively rejects.

Only abusive actions should be called as such. Height bugging is abusive. Breaking boss AI is abusive. Not doing Rot Passing isn't abusive. Please do not muddy this discussion.

Anyways, as others have mentioned T2 enrage is a method that is relatively foolproof, at the cost of some time (how much is usually gravely exaggerated by people who prefer Rot Passing; the actual different isn't that big). It is one that requires little coordination, making it good for groups who don't know each other beforehand. If you'd like to Rot Pass, join an FC and see if you can convince them to do it with you or something. Nothing is stopping you from finding other people who agree with your sentiment.