I know first hand that if you have a great rig, things are fine. 9800x3d + 9070xt can play anything, anticheat willing :P

It's still important to see the difference though imo. The more it becomes a meaningful metric the more software developers will consider it. Especially if the western gaming publications start publishing it. It's the metric of "Is this game shit because the devs haven't bothered to look at how it performs in wine?" ProtonDB is a start, but still lacks non-steam titles and it isn't prominently shown in places where it ought to be, like steam store pages. The closest thing to a linux compatibility check on a steam store page is if it's supported by the deck. Tons of games I play aren't really suitable to the deck but run wonderfully on linux.

Plus the 5060 example is a good illustration as to why it's important to see this stuff. On at least one game it's practically unplayable on linux, but runs basically fine on windows at the same settings. These scenarios are exceedingly few, but the cheaper, weaker GPUs are the ones that sell the most.

If linux market share continues to increase we will see more and more linux native builds and the situation will improve substantially. It's already a wonder that wine works as well as it does, way better than just a few years ago anyway.