Oh no, we had a bug once when our software uploaded the property to the web with the address unlocked. The place got swarmed by people who would just enter the property at any time, not giving a damn about the owner's privacy. They were ringing the doorbell, asking about the price and if they could see the place right then and there. Agents are the first line of defense against shitty people.
Heck, you can buy over 1000 security cameras and still save money.
I was curious and did the math. I'm using motion sensitive security cameras that only record and upload when motion is detected. At the places with the most expensive residential electricity in the US or the EU 1000 of those cameras would need under $5 of electricity per year. There's also the thing that the cameras upload to. I don't know how much power that uses, but it is powered by a 5 W USB power supply so can't be more than $22/year.