You can pick apart any general statement by providing specific use cases. If you don't agree with the generalization, then that's fine. It doesn't invalidate the generalization...
The workbench has your best equipment within reach, maybe more than you need. When you're away you have to make do with what's nearby. Put another way, I've got the multitool in my pocket, toolbox in the truck but tool tower in the garage/shop.
Low Z has a few uses, but I say typically on the bench it's rare because you have drawers of resistors or a substitution box for creating any specific load you want. Away from the bench a common use is to see if that voltage you're seeing is "real" or just induced via nearby wiring.
Sometimes your bench DMM is too far away or you want the display right next to your face when you're deep in a repair. So the BM869s seems pretty well feature packed for that. BUT, no reason a BM789 can't be fine too.
And what do you say about my DMM that has a thermal camera built-in? Hit the button, now I can instantly see that loose connection or an overloaded circuit, etc. So Brymen is the loser now...