Because when my IP address changes all my websites stop point to the services. Unless I go and change the A record in my DNS every time that happens, which is frustrating and annoying. Cloud flare tunnels fixed that for me so that no matter what happens my domains are fixed to the local host services in my machine with no port forwarding and no DNS maintenance
Could you imagine how SWEET this feature would be if it was a Encrypted FOSS Self Hosted Service?