Because you love using Microsoft's shitty technologies, but also want to be completely unemployable?

It's pretty baseless to claim that modern dotnet is inherently shitty. They've made tremendous strides in the dotnet core era.

F# making you unemployable is debateable, but I don't see what makes F# any less employable than most other FP languages. They have some niche applications that make it useful rarely, but when they're useful its a terrific tool for the job. F#'s ability to interop with the rest of the dotnet ecosystem positions it better than most functional languages for business usecases.

I'm sure Microsoft has developed a lot of bad tech, but by and large their languages have been great. msvc c++ compiler as a possible exception, but f# in particular is excellent.

I've spent my entire career, 22 years, primarily in C#.

I'm quite employable.