Let me stop working so I can read these studies about how productivity soared. Any links?

Anecdotal evidence:

Young people suck and take advantage of work at home.

Older people who have been in the workforce get more done and more effective (depending on roll).

Obviously, there are exceptions but seen this trend consistently.

There are just as many showing a huge drop-off in productivity. At best, I think WFH can work well for highly paid goal oriented engineers. For most positions though, it's proven to be a drain, which is why so many companies are reversing course.