Maybe my situation is just unique, but due to my job I'm able to have a single workstation with multiple high VRAM GPUs. I wouldn't be able to justify the cost of buying new GPUs and an entire rig just for gaming or AI image/video. I wouldn't foresee more than 2 VMs using the GPU in high priority at any single time.
When I'm not working this system sits idle or is running renders. Why not utilize the amazing resources I have to serve my other needs?