when Red Velvet originally debuted there were always arguments over who was a better dancer Irene or Seulgi. But then Irene got so much more popular than the other members that I think Irene fans decided there was no point in being greedy and stopped arguing as much about the dancing in particular.
Then all these new kpop fans came in over the years who never paid that much attention to her dancing and just knew her as the it girl/main visual of 3rd gen and she became more and more reduced to a pretty face. Her singing is super underrated too, she's a very capable singer, yes she's not lead vocal material but she's a much better singer than a lot of visuals and just as good a singer as a lot of idols deemed "all-rounders."