I have also yet to see a single WFH advocate explaining how to square their replies to objections (usually "managers should find better KPIs") with their theory

I have also yet to see a single WFH advocate explaining how to square their replies to objections (usually "managers should find better KPIs") with their theory of the firm (you don't just rely on KPIs, unless you are as good as Bezos at what he does you can't just treat employees as replacable cogs that might as well be replaced by KPI driven freelancers and subcontractors).