There is bacteria everywhere in your house, on your skin, inside of you, on every single surface on planet Earth.
The idea was to keep Covid out, any other contaminant you think you're getting rid of has already breached your security. In fact, bactericide usage will select for stronger and more resistant bacteria.
What you need is a clean room, otherwise it's a futile exercise.
Common diseases like the flu were always unpleasant, but you especially don't want to get them during a pandemic. I'm sure a lot of us started sanitizing surfaces when it was believed that's how covid spread, but it's been really nice not getting sick for a year now and I for one will keep doing so long after the pandemic is over.
The idea was to keep Covid out, any other contaminant you think you're getting rid of has already breached your security. In fact, bactericide usage will select for stronger and more resistant bacteria.
What you need is a clean room, otherwise it's a futile exercise.