No it’s more like, does vscode lead to better code than jetbrains? Figma doesn’t really provide meaningful constraints on a design that would let you identify it as Figma sourced, much as you won’t be able to tell whether a site was written in a particular IDE.
You seem to have a fundamental misunderstanding of what Figma is. Your question would be better answered if you took some time to look at figma, rather than looking at the designs people create with figma.
So tell me why the UX in the web gets worse if all these tools and framework make the DX better?
On mobile I have a limited data plan and the speed isn't always the best and on many pages I have to wait because beside the ads I have to download 3, 5, 10 or even more MB of data just to get pages where button, links and headline are undistinguishable because of recent design decisions.
Seems to me these tools are worthless in the end, if you are a user. After bootstrap it went pretty much downhill.