Depends on the industry. I work in robotics and remote work is difficult. Almost every engineer needs to work with actual physical things that move and break. Motor controllers dying, cameras lenses getting smacked out of alignment, wires getting pulled, test circuits going up in smoke, these aren't things that are easy to deal with from a distance.

In general, it's also embedded systems that are (a) most difficult to remotely flash and test and (b) most easy to irreversibly damage if you're not in front of them during the testing process.