I'm guessing you're thinking Reolink or other Chinese ultra-commodity cam. It's fine, it's just in a different product class and ecosystem - and that's where enterprises fit in, they want that support+ecosystem and not DIYing.
Reolink CX820 8MP $129 https://reolink.com/product/cx820/
Unifi G6 8MP ~$300 https://techspecs.ui.com/unifi/physical-security/uvc-g6-dome...
Avigilon H6A 8MP ~$1200 https://www.avigilon.com/security-cameras/h6a-dome
I do that with my Unifi Protect doorbell. RTSP streams. Google Coral. Frigate. Scales very well. Do ML on low quality stream. Look/save the high quality stream. You do it all centralized, and you can put the camera(s) on a seperate VLAN. They don't even need internet access. If you run them over PoE twisted pair, the attacker would need physical access to perform MITM. Wireless, one should assume the camera is insecure (e.g. KRACK).
The purpose of my comment had only been pointing out those features don't come onboard a $100 cam.
I think they're definitely not Avigilon, Genetec, Verkada, but we run a few hundred UI cams in some edge areas. It works, esp if you don't demand orchestration.
What's the comparison at $50-100?