You certainly can buy good high end webcams. But their market profile here is clearly still B2B and Telepresence, no Prosumer or Individual Professionals yet.

Cisco had some impressive cameras in their older Telepresence products: https://www.cisco.com/c/en/us/support/collaboration-endpoint...

But the Cisco TelePresence Precision 60 Camera CTS-P60-K9 ist Ethernet Only and needs prohibitivily expensive hardware to work with.

https://www.cisco.com/c/en/us/products/collateral/collaborat...

Next up is probably the Logitech PTZ Pro 2 or Rally

https://www.logitech.com/en-roeu/product/rally-ultra-hd-ptz-...