No, I'm arguing there's a way to force-start even socket-activated services.
But this is really a moot point. Systemd's socket activation is really meant for system services which would otherwise be in the critical path of system boot. 'Regular' client-facing services that people normally run–webapps, etc.–are not really the target use case. It's fine to start them up in the normal way, with WantedBy=multi-user.target in the [Install] section. And I have never seen people use socket activation for them anyway. So you are basically arguing a strawman here.
Sounds like you're arguing something like "yes, it's broken. But you can just reimplement everything and it won't be broken anymore".
Yes, I can also turn off "kill user processes on logout", but that doesn't make that not-broken.