Yes Linux users generate great reports because they care and usually are more knowledgeable.

But treat the reports cost time and work, and usually this problems will not happen for the majority of their use base.

So, as the company, you can have 0.1% of your sales generating 20% of extra work that will not benefit 99.9% of the users. It is easier and cheaper to cut that group (us Linux users) instead of support.

If that was the case, no console ports would exist, except maybe Xbox because Xbox uses modified Windows internally.

https://news.ycombinator.com/item?id=18845205

The cost to maintain “native” ports is too high to make sense for most developers.

PS: Proton also makes it easier to preserve games since an “native” port would become incompatible overtime without work to adapt the software to changes in the system it’s running.