but we've gotten complaints in the past about that making the Mac a second-class citizen
As one of those complainers, I'd just like to point out to the contrary-complainers that beta releases, ALL OF THEM, to Apple operating system really –ARE– things everyone in the Apple community SHOULD be aware of. Yes, I understand the flood of updates, at one time, seems unnecessarily redundant, perhaps. But as a Mac IT professional, I (and others) keep running logs of what is working, and not working, on these systems… I have to support them, to support the community! Testing releases (betas) have substantial importance to everyone: they show progress, they show what Apple is focusing on and what they're doing poorly (needing fixes), and they show to the attentive a "pulse" of Apple's well-being. If readers are ignoring that pulse, they do so at their own peril; I was with Apple in the '90s, I saw how quickly things tank. (Ask any Microsoftie how the Vista era felt.) Seeing the releases on the "front" page of MacRumors should serve to create interest in folks; the more who get interested in the nuts and bolts, the healthier this ecosystem will be. Apple isn't perfect, and the quality of their software the past several years –should be concerning– to all (it has gotten significantly worse, not a good trend). If you're not having issues, I'd suggest you aren't using your Apple purchase to the value of its worth. And continual testing is the way those limits are polished to smoothness.
Wanting to ignore the beta releases, yet rah-rahing how great the Apple ecosystem is, is missing a fundamental component to the equation. A new beta to iOS or macOS is MORE important to me—to every one has already invested!—about Apple as is the rumor of a new piece of hardware… one is reality, one is fantasy (until it ships).