I feel like it’s a historical accident. In the past the platform couldn’t do it all, and if you wanted a dialog you had to use a library. Developers were trained to reach for libraries when they needed something like a dialog.
Then react came along and all developed learning web development after react had little to no knowledge of the platform. They were taught that touching the DOM was a bad thing to do.
That’s about it. Even now when I advocate for vanilla css I get the side eye and “tailwind and shadcn should be the default”. I get it, it’s what most people are familiar with, even if it’s worse than the platform.
Then react came along and all developed learning web development after react had little to no knowledge of the platform. They were taught that touching the DOM was a bad thing to do.
That’s about it. Even now when I advocate for vanilla css I get the side eye and “tailwind and shadcn should be the default”. I get it, it’s what most people are familiar with, even if it’s worse than the platform.