But just because you live with someone that tests positive doesn't automatically mean another person in the household will catch it. It's stupid.You can still spread it to others even if you don't have symptoms. The tests aren't great either. My brother had COVID and 4 of his 5 LFT's were negative even after testing positive on the PCR.
It comes down to whether we're bothered about protecting the vulnerable or not. If we are, then it makes sense to isolate if someone in your house has covid. If we're not, then everyone should crack on.
Should be daily testing for Omicron the same as Delta.