Canon R3

[Fast Glass]

That's not how resolution works.

Resolution doesn't make it blurry, and the difference from same 20 to 30 mp to 50 will not hide things like that.

In a ideal world where noise is a non issue, and many forms of photography it's already a non issue, you want as much resolution as you can. There are times when it is rendered mute because of diffraction, lens softness or other factors. But it does't make it worse. It just doesn't take full advantage of it all the time. But still better to have it overall.

In your use case it might be rendered mute as you stated, and I can believe it. But as long as the noise performance is there. Doesn't make it worse to have it. You can always down res after the fact or use S-RAW if you want.

And I would imagine a camera like the R1 wouldn't hurt for over noise performance.