A lot of business don't want to bother performance managing that closely. Plenty just worked off of trust.
* You hire someone, and then figure out someone else is doing the work (usually because they are making stupid mistakes, and the person you hired can't be that dumb)
* Your staff work odd hours that make coordinating hard (side gigs / hussle's etc).
* I think the rumored record of multiple full time jobs someone was working was 5+.
* We interviewed someone who was upfront they would be working for us while working for her full time day job remotely.
We deal with sensitive information. Having data go overseas etc is a no go for our business at least.
Note: If you have to deal with government agencies that have gone remote you KNOW that the throughput is sometimes < 50% what it was before. You can almost immediately tell as someone dealing with them. No one answers their phones, all voicemail, all super long delays (week+).