Given the quality of many developer-designed UIs this can only be a good thing.
Developers often prioritize implementation expedience over user experience.
A lot of developers think that “clean code” is as important or more important than user experience. The job of a designer is to tell them that they’re wrong.
Custom mouse cursors, unaccessible images, non-obvious buttons, non-standard interactions, strobing lights, a million parallaxes.
A lot of designers think that "pretty" is the same as "usable".
Most devs I know, don't care about "clean code" itself, what they care about is _robustness_. If getting something to work requires thousands of lines of html, css, and javascript, then I can guarantee you that something is gonna look broken on some browser in some viewport size.
When designing you need to keep any mediums limitations in mind, be it paper or the web. The medium is the message. Browsers are buggy implementations of mediocre standards, if you design oblivious to their limitations things will inevitably be buggy, ugly and weird.
Designers can't just live in an ivory tower of auto-layouts that actually work, and have devs magically weave their dreams from garbage.
If we just replaced the web with figma (or if Figma had a runtime like Rive, to just run the entire thing with the web as the platform), I'd be more than happy, not being editor-first is the biggest flaw of the web, and figmas auto-layout is a lot less sucky. But until then, (good) designers have to learn the basics of the tech stack too, and figma does not help in that department.
For the record, I am a developer, always have been, and have been so for some time. I just don’t share these delusions of grandeur.
Developers sometimes also need to be forced to accept complexity that they don’t personally see the point of. For example animations and transitions may appear pointless to developers as they don’t have any function: no APIs are called. However for users, especially non-technical users, animations can be very useful to show the flow of how various UI modes are connected, and to communicate subliminally as many users don’t read text prompts.
If you let developers call the shots then they will choose whatever UI makes the code as simple as possible, because they spend more time looking at code than the actual product, in contrast to users who never see the code at all.
Too much design, too little value.
Many useless design elements drain the battery and take time to render.
Fortnite isn't a web app and I doubt that Figma was used by the game designers.