Lol same. I think it’s probably because commenting is more like normal conversation; you’re responding to other people in ways that are specifically meaningful to the circumstances. Writing is sorta like talking to the void in my mind. I find I spend much more time thinking and checking and re-reading to make sure I’m appealing to my imagined audience, rather than just contributing a sentence or two to a conversation where the audience is a bit more concrete.
I say “look it up”. Applies to lots of forms of search, be it google, DDG, YouTube, Wikipedia, a dictionary, a manual, pretty much anything.