Microsoft touting WSL is an attempt to steal market share from actual Linux. It’s designed to make people think “if Windows does everything Linux can, why do I even need Linux?”, thereby feeding Microsoft licensing money, market control, and the user’s data. It’s not a move with computer users’ nor the free software ecosystem’s best interests in mind.
You’re absolutely right. However, being forced to work with windows at work, I’m glad I have a lightweight virtualization solution that allows me to avoid a full VM.