See, this is the crux of it. Lou missed the Final Four of her freshman year and then never got back to the National Championship game. So people have seen her play in big games where UConn came up short.
And then she's gone on to a pretty good pro career but has yet to have a breakout WNBA season. So people have seen and dissected her flaws there, too.
Meanwhile, Caroline just scored 28 against a top-5 team. From there, it's easy to write off all her flaws and assume she'll never struggle. To just pronounce that she will not fail to takeover Final Four games, easy as that.
By the way, check the box scores of those ND final four games. Lou played well in both.