Imo that’s perfectly fine and not idiotic if you have a static IP, no ISP blocked ports / don’t care about using alt ports, and don’t mind people who find your domain knowing your IP.

I did basically that when I had a fiber line but then I added a local haproxy in front to handle additional subdomains. I feel like people gravitate towards recommending that because it works regardless of the answers to the other questions, even their security tolerance if recommending access only over VPN.

I have CGNAT now so reverse proxy in the cloud is my only option, but at least I’m free to reconfigure my LAN or uproot everything and plant it on any other LAN and it’ll all be fine.