That's because it's incomplete.
A $5k screen is not so much a tool of the trade as an accessory for someone signalling themself to be valuable or valued. More commonly, coming to own these things is the result of little professional envy.
Our software engineers spend all day developing. They sit in $2-300 chairs and work on their preferred displays (last gen dual Apple TB displays for the Mac guys, dual anythings for the Windows, 1440p ultrawides for the java team).
You know who the only person in our org with an XDR is? The CIO with a MacBook Air, for writing emails and teleconferencing. They got theirs because another C-level made a big deal about how they couldn't work without their dual 5K UltraFines, also for sending emails and teleconferencing.
None of our enployees who could make use of an XDR display owns one because they either own a more industry-capable professional display (Flanders Scientific, Dolby, Sony pro series) or got an iMac Pro when they existed for under $5k.
I don't fault anyone who admires the XDR any more than I fault myself for liking any of the niche luxury items I do, but I wouldn't delude myself for even a moment into believing that an $8k watch is an essential investment because time management is an important skill to have.