Is it a strength thing or a mass thing here, though?
Edit: Am I seriously trying to bring more details into a discussion about how a princess with superhuman strength would wrestle a bipedal dragon-turtle?
Well, Mario can pick up, swing, and launch Bowser dozens of feet in games like Mario 64 in spite of Bowser being several times his size and mass, so it's obviously not just mass or even strength, alone. I think it's better to just consider it a factor of "as strong as the plot demands".
Bowsette could though but then again artist interpretation of the Super Crown nerfing her monstrous strength because of being female.
And here I thought it was because Bowser was -!turned into Princess Peach!- and not straight genderswapped. Princess Peach doesn't have monstrous strength, hence Bowsette doesn't have monstrous strength.
But why use logic when we can slander the artist with such ugly accusations.