1. Many people already have built good relationships with their colleagues prior to WFH and talking to them over GVC helps the relationship. You are allowed to open up more when you know no one else is around except you and the person you're talking to 1:1. You don't have to be afraid that someone outside the meeting room or cubicle is going to hear you. A lot of the day-to-day frictions are also removed from the equation. Being completely honest, things like appearance, odor, height differences, physical presence, status symbols (watches, car keys, wallet, phones) all cause insecurities in a competitive office space. I find that in a remote work setting, you can focus more on the person as an individual.
2. Working remotely offers the flexibility to work from a location that better suits your social preferences. A LOT of my friends and myself were completely and utterly miserable socially working in the Bay Area. As soon as we had the option, we moved out and have built thriving social circles. It is not always the person's fault if they struggle to form meaningful friendships. It can also be the environment and whether it is a good fit. This eases social insecurity and allows colleagues to connect more authentically.
3. Working remotely offers the flexibility to detach from work and go do other things (if you don't have meetings etc.). This allows you to interact with people outside the office more and develop more meaningful relationships over time.
Remote work isn't about being locked up in a room and only communicating through a webcam. It is primarily about removing the unnecessary overhead that we previously thought was a prerequisite of work (e.g. commuting, "fake work", watercooler conversations, stressful and contrived socializing events at work, open office plans, can't work on other things during unnecessary meetings, running into people you don't like or who distract you, sexual tension with workers of the opposite sex, being exposed to people's bad moods, dirty public restrooms, walking to meeting rooms across the building, working from a cramped cubicle with smelly people, who can type louder and faster competitions, etc. etc. etc.)