You're looking at a server but correct me if I'm wrong but there is a difference in graphics cards that you would use for heavy 3d modeling and gaming so you'd have to choose which is the most important of the two.
That said I feel as though this is why people generally have a gaming PC and then say a PC which is used for home entertainment.
I personally have a NAS on my network, just basic with 2TB of storage which is used by home devices to backup important stuff and host media, a media PC for the main TV, a gaming PC and then my work laptop.
Of course some sort of all in one system which can do it all and is running VM's for separate functions sounds awesome but that would surely be very expensive. On top of this have you ever heard the fans which come on servers? Good luck finding somewhere to put a server in your house which is going to stay cool enough that it doesn't overheat and somewhere where the noise isn't an issue.
100%, incels will always bring up male loneliness epidemic. Let them die alone.