aside from the rest of the assheadedness of this comment, this jumps out to me:
Look, sorry dude, but if you vape, you haven't given up smoking. If you take nicotine pills, you haven't quit.
and, uh, no? if you stop smoking, you've stopped smoking. there's not yet solid scientific evidence that vaping is a reliable path to nicotine cessation but it is, in fact, not smoking.
if it is nicotine cessation you're talking about, then nicotine patches and pills are known effective tools. they're often prescribed to people quitting. in that case, taking pills is literally "quitting".
but let's be real: you don't care about either the physical act of burning tobacco or the medical act of kicking a nicotine dependency. you're just invoking "smoking" as linguistic shorthand for a(nother) group of people you feel smugly superior to for having problems you don't have
not to out myself as someone who takes family movies all too seriously but while it's relevant: i thought the plot was kinda weird. the whole movie kinda ...
spoilers for major plot points of kpop demon hunters
...sets up mortals-turned-demons as being those who did terrible things and hold guilt/shame for those actions through Jinu with him betraying his family and all. but then Rumi feels guilt/shame for being half-demon because... ??? demons bad? like either demonhood is a metaphorical manifestation of one's guilty conscience, or it's just evil purple people disease, but either way Rumi's motivations make no sense. she doesn't have any big mistakes or regrets in her life as far as we know. we can see she has learned to feel shame about her half-demonhood from Celine, but neither Rumi nor we as the audience actually get any real reason to understand why. it's like a dangling metaphor.