If you don't care that a random person can get remote access to it, then no, I don't think you're "losing" anything. The biggest issue is no protection from 0-day security vulnerabilities, which Microsoft patched a lot of in 2025.
I mean, even if you patch constantly, you are only safe from yesterday exploits — not from the next 0-day, and those keep coming super-often. It seems smarter to focus on hardening the system itself rather than relying on Microsoft to patch things fast enough and hoping you are safe in the gap between discovery and fix.
The smart thing to do is patching regularly AND having a good security posture. Neither can be given up, really.
Also, even risky things can work for a long time. An individual can go a lifetime of speeding, doing drugs, things like that, and not be majorly impacted. And on the flip side, another individual can have a stroke of bad luck despite their good posture.