I think most web pages do not need such features. WebAssembly has seen lots of adoption on the websites that do, like Figma and Photoshop for design, Zoom and Meet for interactive video, Unity for games, etc. etc. But most web pages are just text, and that's fine.

Wasm was never intended to be used on every web page, just like the Video element wasn't.

Yes, but WASM does not solve a problém which (many) people have. Of course there are some applications, like online image or video editors.

Which could have been done with WebAudio and WebGL/WebGPU as well, without the pain of dealing with WebAssembly tooling.

it's maybe negligible compared to the code-size bloat of web applications, but delivering large libraries over the network with only limited caching is less than ideal