Companies have a steady flow of early career people that need mentoring. It's not just one time
Still early career people are only a tiny fraction of the company’s residents to whom all the WFH culture hugely benefits and the company as a whole. Nothing is perfect, but WFH comes closer than anything I’ve in my lifetime before.
Yeah I think most people would agree that a new employees first week would usually be more productive in the office with someone sitting next to them helping.