AFAIK fomite transmission on public streets and other places sprayed by such "deep cleans" isn't a common spread vector for any widespread disease, so eliminating it can't make a meaningful difference.
Even fairly small changes can be significant with exponential feedback loops. That’s not to say they actually had any impact, just that you can’t always tell what was important.
For example it’s possible but unlikely that some other pandemic was accidentally prevented.
For example it’s possible but unlikely that some other pandemic was accidentally prevented.