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.