There are many types of work where large assets aren't important, e.g., illustration, 2D animation, CAD, 3D sculpting (I think? A lot of 3D work that doesn't need pre-rendered assets have really small file sizes), and as far as I know none of these have hugely popular web apps like Figma?
Also remote solutions like Jump Desktop (https://jumpdesktop.com) are pretty popular in the media editing world, so folks are choosing to edit remotely, they just aren't using web apps to do so.
So I still think the unique combination that Figma has is that unskilled folks are viewing, commenting, and editing on the document along with designers themselves, using the same tool. And that's facilitated by the tool itself being relatively simple. It's a common workflow that we see with the office suite software that I mentioned.