The thing to understand, is that everyone inside Apple uses diskutil(8), not Disk Utility.app. diskutil(8) is the "canonical" way to do almost everything related to Disk management on macOS, the same way diskmgmt.msc is on Windows. Everything else is a secondary "convenience" view to just allow certain workflows (like installing macOS without overwriting things, or unlocking a FileVault volume with a master password to install macOS on it) to be accomplished more easily—like the Properties view of a disk drive in Windows.
If there are other "convenience views" of disk management that you think would be helpful, why not make them into an app and sell it? One my favourite macOS programs, DaisyDisk, is basically just such a convenience view. People are willing to buy these—especially as a gift for their "prosumer" friends. Apple can't predict every use-case that a prosumer might want an accelerator for, but the free market probably can.
You explain it perfectly yourself:
> Anybody who is on my "free IT" list for the last few years has been receiving a Mac when it's time to upgrade.
As long as you still prefer Macs over anything else, Apple has no incentive whatsoever to be any better. They merely have to be just good enough for you not to switch and keep using macOS/iOS/etc.
Strong disagree. One of the first troubleshooting steps for 'My Mac is slow/unstable/pinwheeling etc is - Run Disk Utility and check/repair your disk.