"Indie" had been adopted to mean anything not AAA, because "AA/A/B studio" sounds rude. Which is silly, because B level studios have produced some real bangers and fill/ed important niches. Even if a game ends up with 100+ devs, if the studio WAS indie, its 'indie' forever (at this point). Something like Paradox ain't indie anymore, but good luck relaying that broadly.
Similar thing happened to "roguelike". First it meant low-graphic gameplay/storytelling focused RPGs. Then people added "permadeath" to the defining features. Then it just meant permadeath, or "hard", or "has multi-run progression". Now people call Balatro a roguelike. People tried to adopt roguelite, but 1. sounds too similar, and 2. language will be used how it is understood, not how some of us want it to.
Or like how CRPG literally means "computer rpg", which sounds like it could fit practically any rpg, but actually means a specific style of rpg.
Semi-related example: "friendslop" has been coined to mean "multiplayer coop semi-casual progression game". People (who understand the jargon) immediately know what you mean when you say it now. Its goofy and kinda bad, but it works so it'll be hard to stop it from becoming THE genre name.
Basically, yeah its annoying. Yeah its "wrong"/"bad". But its sorta impossible to stop without going the Fr*nch route of having a word-use decider (even then I've seen a lot of younger French largely ignore it). Especially in a living language adapting to a (sorta) new thing. It irked/irks me because I like the idea of words/language having a clear and logical meaning. But I've been killing the redditor urge to go "Uhm actually" and its been pretty good for me personally.