Absolutely. Valve took Linux seriously and it's helped Linux gaming immensely. But you can argue a few things - Valve are private and can still do what they want without an obligation to shareholders. Linux gives them better control of the software on their own devices, so they can tailor the experience exactly how they want. Investing in proton made it so people are willing to buy and use these devices, as the game library becomes nearly identical to windows.

A company like EA, a monolith at this point and historically one of the most profit driven, greedy, arguably scummy companies in gaming, if they're investing in Linux support that means they see dollars and other companies will follow suit. They're specifically looking at their anti cheat software according to this picture which would bring in their competitive shooters, the type of game that is largely missing on Linux.

If their anti cheat supports Linux, others like Easy anti cheat may push to support Linux, and developers like facepunch have even less of a leg to stand on when it comes to ignoring Linux. Unless EA does something like "You must be using our new EA Linux distro for our anti cheat to work" I can't see this being a bad thing.