Learning in a physical office seems easier for the person being taught because it's accomplished at the expense of a priority interrupt on the part of the person doing the teaching. You hit a snag in your work, you get up, walk to my desk, and tap me on the shoulder. I help you out, then return to pick up the pieces of my concentration.

When working remotely, you hit a snag, put a "@here anyone available to help me out with XYZ?" message in Slack, and do some stretches by your computer, wherever that may be. Eventually, someone surfaces from their zone, sees your cry for help, and gets you unstuck. No one need suffer.