Utter nonsense. You can’t say both are the same. The advantages of IP cams let alone quality are in a different league.
The only time one should be installing coax cams is when the existing system is coax.
If you want to stay in the past then do so. When you are installing that DVR, make sure you have a crt screen to go with it.
It’s how cctv installers make more profit if you quoted £1500 for POE most unknowing people would say f**k that. If you quote £600 for a coax setup it sounds a lot better.
While some of the coax systems are good and do come close to the lower end POE stuff I would never recommend coax unless you really don’t want to spend a lot, don’t want to future proof your setup and don’t really care all that much about superb quality.