Personally, I see the MBP as a hybrid use-case device, much like the Nintendo Switch: it throttles when freestanding (because it has nowhere to dissipate its heat to), but it runs more quickly when "docked." So you can use it for light things portably, and for heavy things at a desk.
Unlike the Switch, there's no first-party dock for the MBP, but search "mbp cooling dock" and you'll see many accessories designed specifically for the MBP to enable this workflow.
> FinalCut, Logic, and XCode
Two of those persist for the sake of enterprise media-production companies that fund the engineering resources for them all on their own. If Apple were trying to push these for new customers, they'd still be making Xserves, as the hardware to go with this software. New companies need render-nodes, right? But they aren't, because these apps are only for these "legacy" media companies that already have render-farms and don't need Apple selling them render-nodes.
Xcode exists because Apple uses it to make macOS and iOS. (And because the period where MPW sucked and CodeWarrior was third-party and so hard to get new features supported in was a bad time to be an Apple system-software developer.)
> No one is asking for a tank
No, but a keyboard that'll keep working when you spill bacon grease on it, or a computer that won't choke in a sandstorm, is pretty damn ruggedized. Most computers, regardless of manufacturer, are not capable of surviving those onslaughts.
> editing 8K video on-site in Africa
See, this is what I was getting at with the difference in perspectives here. A ruggedized workstation would work just sitting around outside in the heat and dust and light of the savannah. Whereas a professional workstation is—like a server, or (in previous decades) a news crew's satellite uplink—something that exists in a designated editing-room in a designated trailer you're hauling around with the crew.