I think her raw power gives that impression which makes us overestimate what she can do. But compared to both players, her movement even at the best of times has been wanting. I have seen a number of players win points by moving her side by side because she can't turn unit fast enough. That is, her height which gives (or gave) her a big serve and massive power is also a disadvantage when it comes to movement. And she could serve faster than she does but for the fact that her technique isn't great and she is merely leveraging her height. She is basically like a Del Potro of the women's game but with less talent (and much less heart). She is lugging all of her might into every shot which is ultimately an exhausting way to play. So her results up to this point aren't a surprise. Compare Sabalenka's forehand to Ivanovic's and Ivanovic was all easy power. It was beautiful technique and timing rather than muscle strength. That's why she could make deep slam runs in a tougher era than the one Sabalenka's playing in...and eventually win a slam too albeit her finalist that one time was weak.
