I'm a player who really enjoys having lore-immersed toons and having outfits, weapons, etc. to match them, their personalities, their story I have written for them. I'm not the biggest fan of the maid outfit, cat ears/tail, HMS Divinity even if the concept makes me die laughing etc. But I'm not about to say someone else shouldn't have all those things if Anet chose to make it available. By all means, have your cosmetics, even if they don't fit into my idea of the lore! That's the thing though- my toons, my vision for them and what they wear, what weapons they use and what they look like, what exists in Tyria and what doesn't, it's my interpretation of the base lore. It may be supported by base lore in some place, way or even just NPC dialogue but it's still my take on it.
If someone wants to have the shiniest charr to rule them all, a wibbly wobbly rubbery sword that can somehow unalive risen again or cat ears/tail like we're in FFXIV, then go right ahead. I may not like it myself but that doesn't mean they don't have the right to like it or gods forbid, use it in my presence! </sarcasm> I don't have immersion issues with them because I can think of them as noncanon in my interpretation of lore, just as they may even think that my toons and outfits may not be canon to theirs. That's assuming they even care about lore and immersion.
At the end of the day, you do you for your cosmetic choices. Just don't tell me that I can't do me for my cosmetic choices. 😄