WFH is good or bad depending on what task you need to do. My first year out of college (roughtly 1998!) my boss looked at me one day and said "you are on a complex problem: don't you dare come to the office tomorrow as we don't want you distracted". However I only made it a few hours at home because I soon ran into a problem where I needed to talk to someone else (my code was working all along but there was a hardware problem and once the FPGA was fixed it worked - since I was just out of school and the FPGA engineer has decades of experience they blamed me first and this once that was wrong)

That example, if you never came in the only thing an observing boss would likely know of is that you failed to do a task. It's also super easy for that FPGA engineer to not tell others he made the mistake.

I notice a general problem of wfh is people have zero connection to each other. It's easy for everyone to get "corporate" with one another because they have literally no care or connection to each other. It's really hard to let your coworker look bad if you hang out and chat every day. Not a lot of people I know are willing to toss a friend under the bus but wfh makes it less likely to have a real relationship.

Old friends and long time coworkers that are good at their job have basically no problems wfh.