Why? It's hard to see what they're good for outside of AI data center workloads. Your average member of the general public arguably doesn't have much use for a "graphics processing unit" that isn't actually capable of processing graphics
For my part, I do work on machine learning projects at home. But I'm nowhere near operating at a scale where datacenter GPU features like being optimized for 4- and 8-bit calculations would be a net benefit. Nor do I have any particular desire to have one of those things making my home office sound like I live next to a steel mill.
It's not too far off from why I don't have a box truck parked in my garage even though it's technically more capable than my Kia. And on the occasions when that is what I need, the local hardware store will gladly rent one to me for $20 per day.