You should trust employees who have a good track record to work remotely if they want and are sufficiently operating independently.
JR employees should be allowed to work part time remotely after some time in office.
There isnt a good way to inprint culture remotely, and there is a learning curve for jr devs who need senior devs for support/the internal support structure. So most Incs would be in bad shape if all there strong engineering talent worked from 6pm to 9am (as I would left to my own devices) because their jr devs wouldnt grow and other devs with supporting software on dif schedules have to wait.
Tldr not all offices are open plan, growing a team (culturally & skill-wise) is easier in the office, part-time remote work and coordination is a good tradeoff/reward for employees of all skillsets and functions.