What you're missing is that a rapid test like this can be used as an entry check at restaurants and other public venues, allowing them to go back into business. Even if the vaccines turn out not to work for some reason, we can have our economy back, while limiting spread of the virus. It's not so much about getting people to fully self-quarantine, although that would be nice, as about eliminating super-spreader events.
I have read elsewhere about researchers at least trying to develop 15-minute tests. Not sure what the status of their work is, but some think it's possible -- and they're specifically targeting entry checks.
