This is a good thing. Yes, it's not perfect. Yes, Fortnite and Epic are not great. But it's so exhausting when people say "you can't game on Linux" because games like Fortnite don't work on Linux. The argument I always make in response is that it's like saying you can't game on a Gameboy because it doesn't have Fortnite.
The main reason for a lot of people not switching to Linux is because they only play games like Fortnite (competitive multiplayer games with aggressive anti cheat) and those games don't work on Linux. (Marvel Rivals being the big exception to the rule.) Fortnite supporting Linux in some form will bring more users to Linux. More users on Linux will mean more studios view it as profitable to support.
So, yes, this is a good thing. Yes, I fully admit it's not perfect, but it's a huge step I think most of us can admit we never saw happening.