I think the point isn't to say Valve's help isn't appreciated, but to give a little reminder to share some gratefulness with the amazing people developing Wine before Valve got involved as well. It was and is an impressive piece of software in its own right. :)

That doesn't mean Valve wasn't a complete game changer. The fact that they managed to make a handheld Linux gaming device popular among gamers rather than just open source fanatics is impressive as hell, and we're all better off.