Reason for this meme is that some ubisoft titles are shipped with a broken version of ubisoft connect launcher. Installing these games is only possible by running the installer for the launcher again via protontricks.
I don't understand why they would spend money supporting a Linux launcher. Almost all of there games are either older or very indie. They technically have Linux native games but they are very few. It is much easier to just run the Windows launcher since all the games are Windows anyway. It is all a integrated system that doesn't need tweaking or skill to use.