I think we have to think about why homes seem to be better environments for spreading it than pubs, shops, etc.
The factors must be the size of the space you're in, time you spend sitting closely with people, ventilation, etc.
Stands to reason that if you're in someone's 3x3 metre living room then you're breathing in whatever the other person is breathing out. In a big space like a bar or restaurant it's not quite as direct; the potential spread is diluted in the bigger space. Plus in a bar/restaurant you might be there a couple of hours, moving around, whereas in a house you can be there for a completely unlimited time.
It's not really tinfoil hat territory, it just stands to reason. Some fuckwits on this thread though, are the reason the rest of us will have to live with restrictions for longer. Big hand for you!