Op was saying that he/she could not run WSL2 without Microsoft telemetry.
So, yes WSL2 includes Linux plus Microsoft telemetry. Parent was saying that Op actually wants Linux, since Op wants Linux functionality, but not Microsoft telemetry.
It is not true Linux in spirit because it forces the user to live with telemetry and other closed source software and drivers, which defeats the purpose Linux itself was built upon.
Not just that. Privacy, trustworthiness and security aside, let's imagine Microsoft porting (or simply making WSL-aware) some of their software, libraries, system internals hooks, anything that Linux users wanted for ages, gaming libraries etc.), to WSL and not Linux, that is, they require WSL but won't run on Linux, or will run "better" on WSL, or possibly will run on Linux but require some closed or prohibitively licensed code to (properly) run.
Those surely are bleak scenarios, but corporations are there to make profits, and forcing Linux users to require a Microsoft branded layer of software is without any doubt a way to keep them hooked to Windows, which for some will turn into buying products and services from Microsoft, and for others into finding less and less software that will run on plain Linux. I wouldn't be surprised at all if say in two years more books will be published about WSL than about Linux. That would hurt as well since it would mean less courses, less schools adopting Linux, in plain words less users.
Op was saying that he/she could not run WSL2 without Microsoft telemetry.
So, yes WSL2 includes Linux plus Microsoft telemetry. Parent was saying that Op actually wants Linux, since Op wants Linux functionality, but not Microsoft telemetry.