I've worked in factories and seen the degree to which productivity is an issue. I actually lobbied for us to use the time tracking that was already available to us via our ERP, and management declined. Humans are lazy by default. We seek the highest return on our effort. Building great things (i.e. making life better) requires us to fight this instinct.
Additionally, I have seen absurd abuse of WFH/remote since COVID among co-workers. There have been instances where I truly cannot wrap my head around someone seeing it as anything but theft. I don't particularly like being monitored either, but I definitely understand the motivation for monitoring or RTO initiatives.