renai circulation

ok so im just talking ab this bc i keep seeing the topic and i need to see if ppl agree w me or im just stupid

so ive seen ppl saying "girls singing renai circulation look real stupid when the find out the anime that its from is ab a guy crushing on his sister" or something like that but??? does it even matter? its a good song and it just feels like ppl are just trying to ruin smth other ppl enjoy(specifically girls in this case, as usual).

ive looked up the english meaning of the song and havent seen anything that makes it inappropriate yet so like?? is it that wrong to enjoy the song? its not like ybc where the song is ab r/pe and stuff. its seems like just an innocent love song.
ik that its not smth getting worked up over but im just confused why ppl had to ruin the song