Not going to point all, but these for example would most likely come a lot WORSE (ear piercing, off vocals, wrong pitched) than Dearest covered by kuu, yet ppl don't comment on them.
Trauma -meets TRF- -
evolution -meets BoA- differently from Dearest which is a very simple song that can be covered by any person in this world, evolution is actually one of ayu's signature songs. BoA wouldn't be able to nail it, because that song has way too many ayu elements: la, la, la, ayu's fast singing, etc.
Boys & Girls -meets TOHOSHINKI- ewww, this song needs the female high pitched vocals for its cheeriness...seeing a bunch of men going "na na na na na na na..." would be horrible
SEASONS - otsuka Ai - bad, just baaaad..SEASONS with squeekiness does not match
Fly high - TRF

Boys & Girls | Amuro Namie - not something that suits namie...way too cheery for the kind of stuff she sings
(I'm not criticizing the choices, because the thread was made for fun, but I just felt like pointing those out because kuu covering Dearest is actually one of the most normal choices for an artist covering a song there)
Yet I see nobody freaking out and going "no, don't touch that please".

I still think it's clear that some ppl are trying to reassure their hate (or extreme dislike for those who deny the hate word)for kuu here.

It's always kuu that has to pop out in these discussions:
ayu and kuu wins on polls for fashion trenders: "oh no, but kuu totally doesn't deserve it"
kuu appears on a artists covering ayu thread: "oh no but kuu can't totally cover it"
kuu wins some award "oh no because kuu didn't deserve it. ayu totally did"
I wonder how many times will people have to have kuu as a sort of dark shadow following ayu
For real, change these broken vinyls ppl.