Depends. I think it's valid. There are a tonne of libraries available in both ecosystems but I find they tend to optimize for different things.
I came from the Java ecosystem to .NET and even they are different. The .NET ecosystem was held back a little by the lack of embracing open source at the beginning and being super commercially focused. So things like finding a good library for easily working with PDF will set you back $400 rather than just using the defacto library that everyone has used forever and is free. I've encountered that with PDF libraries, rules engines, workflow engines, job scheduling libraries.
It's still a decent ecosystem, it just is different because of its roots.