CPU heavy titles will benefit, even with a lesser GPU. Despite having a 12700k, as a WoW player, I would love to have an x3d chip, as WoW loves that extra cache, and greatly can help with min FPS. Before you say it, I wouldn't call 7.25 million subscribers fringe.
I went from a 3700x to a 5800x, back during Shadowlands, and even with an RTX 2060 at 1440p, I saw a significant boost to min FPS, and far less stutter. Hence why I chose to keep jay's 12700k rig, that I won, as the 12700k was a bit better CPU side, over keeping my 5800x. Only thing I changed was swapping out the 3070ti, for my RX 6800.
Microsoft flight sim is another CPU heavy title that loves that cache. Even the 5800x3d beats anything Intel has to offer.
Just because you don't have a reason for such a CPU, doesn't mean there aren't millions that do.