Some of Big Tech hates "small is beautiful" and stability in time then will fight hard with their $ for that not to happen (administration "corruption"). Complexity and size (including the SDK then the computer language syntax complexity) is their bread and butter to keep "control" and keep alternatives away.
For the "bootstrappable", it is the starting point of building from 'small and simple' toward big and complex, aka the SDK 'binary seed'. At the time anybody would expect a 'simple C compiler' with a simple linker and assembler buildable with that simple C compiler... but people at the gcc steering commitee and the usage of many C extensions without maintaining proper fallback to assembler source files (in kernels, hence linux) broke the chain of 'sanity' for good. Now you must have an ultra complex c++ compiler to "bootstrap" (~LFS), not to mention the required zillions of complex tools required by the "build systems". Lately, it seems AI coding may be the salvation here... How? AI seems to assist writting c++(insert you computer language with a complex syntax here) to simple C "transpilers" (somebody pretended to have done the same with a rust->simple C transpiler, was published here on HN). I have to say I have never used AI, since they are gated with the web engines of the whatwg cartel (I cannot even get a token to use some web API), I have never tested.
The conclusion: fixing the software stack to let sane small alternatives to 'exist' and be 'real life' is probably not going to be calm and quiet.