Humans are complex.

I have met people who seem to have terrible marriages and seem to spend as much time away from home as possible due to that situation. I have also met people that enjoy working on group projects and enjoy building relationships through that process.

I've worked from home for most of the past 17 years and would never go back to 100%, but I also miss making friendships at times.

The best friendships I've made in adulthood are mostly ex-coworkers.

Why? You'll spend a huge time of your life working, why is it not worth it to build relationships? You don't have to meet them in your free time to consider them friends.

In the US you may have to change jobs frequently or accept pitiful raises. If your healthcare and social circle become too tied to one employer then leaving or being fired could be a huge change.

Building a professional network is important, and some bonding is natural, so I don't mean to discourage them. Though I do prefer seeking most social fulfillment through other means.

I agree, but I'm not saying anyone should only have friends where they work, but rather that you can have both.

I don't live in the US, and almost all of my friends I meet on my free time are not through work, but I do have colleagues who I consider friends and it makes work a lot more enjoyable. That being said, there's only very few of them who I would be likely to keep in touch with if they or I quit.