Opinion on some "White Girl R&B" takes

So to me there's only a few white girls (Ariana, Christina, JoJo) who I'm a fan of and consider either R&B or R&B adjacent. But friends of mine are saying I need to put P!nk, Kelly Clarkson, and Nicole Scherzinger (who's not even white) in that same category, when in my opinion they're nowhere as soulful music-wise, even if they had ONE era where they did. Am I wrong?