That person is missing the point that a randomized MAC will often get a different DHCP lease, and the MAC address is used in that, so the IP address will change.

On a trusted Wi-Fi network, disable MAC randomization on your clients, and if possible reserve an IP address for their non-random MAC address. Some devices have a deterministic random per WiFi network, which could also work. In iOS this is WiFi network -> private WiFi address “fixed”. “Rotating” would cause your hole problems.