I mean I’m no expert but I do have some knowledge on the subject.
The difference is how you injest it. Our stomachs are much more resilient than our lungs. Your stomach is, for all intents and purposes, a sac of acid that dissolves mostly anything you put in it, your lungs on the other hand literally only do 1 thing all day and it’s breathe air. There are different qualities of air of course, and microparticles in it that could cause harm, but on the whole it’s more or less all the same.
Its like dumping garbage into a sink vs. a paper bag. The sink will get disgusting, and you may end up with a clogged drain, messed up pipes, or worse. But at the end of the day if you just clean the mess and don’t do it too often it will probably be fine. The paper bag on the other hand is gonna get Soggy, gross, and start falling apart in your hands. You can dry it out but it will never quite be the same…
Not sure how to help you with that one. People call for an end to vetos literally every time it’s used