People will try all sorts of weird language experiments, so it's no surprise those libraries exist. But do you really expect a significant number of web developers to shift over to C, just because it's technically possible?
https://www.micrium.com/rtos/tcpip/
Quoting the relevant quote "you wouldn't use C to write your simple website", except that is exacly what EE does when on device memory is measured in KB.
C++ would be safer, but the C89 culture reigns in such domains.
Micropython is not really python (which by definition is defined by PEP and CPython implementation), it's a language largely similar to python 3 since you can't just pick a python program or library and run on it at all times, but it's not really a relevant discussion (and it's nice to have multiple variants of a language you like that are good for multiple purposes, which solves the bloat problem as long as you use only one of them at a time).
Regardless, I hope Julia gets to the point that you can target as many places as some of those languages even if it's not nearly the best in each domain (like WASM, embedded, OS stuff, shared libraries).
I get your point, though.