For a good example of that exact line of logic, go dig up the Psionics thread from a few months back. There were quite a few posts that came down to "we don't want WotC working on psionics because it will waste developer time that could be used on projects people actually want".
Uh ... nope.
Look, resources are, in fact, finite. And choices do have to be made. But ... that's just not the case.
Since 2014 (SEVEN FULL YEARS AGO), WoTC has released the following major hardcovers or revisions:
Rulebooks
1. PHB
2. MM
3. DMG
4. VGTM
5. XGTE
6. MToF
7. TCoE
8. FTOD
9. MP: Monsters of the Multiverse
That's more than a rulebook a year.
Campaigns
10. SCAG (FR)
11. Ravnica
12. Acquisitions Incorporated (FR, kinda)
13. Eberron
14. Wildemount
15. Theros
16. Ravenloft
17. Strixhaven
18 Spelljammer (CONFIRMED!)
That's more than a campaign setting each year. Not to mention the numerous APs, including one that they
already set in Greyhawk.
If it was the case that they were barely putting forth new rules now (psionics) or barely putting forth new campaign settings (Greyhawk), that's one thing, But it seems pretty obvious now that they can handle pumping out rules for either psionics or Greyhawk if they are able to put out this content.
I do appreciate people sticking up for the time constraints and hiring practices of large corporations (ahem), but ... yeah, color me unimpressed with the whole, "It's not that I'm against the thing you like, I'm just really concerned that if they do the thing you like, we might not get enough rules or other campaign settings in the future! Allow me to express ....
my concern."