Maybe it depends on where you live, but I'm over 30 and I've made friends with coworkers from probably every job I've ever had in my adult life. Sure I've dealt with a few jerks at work, but very few of the relationships have felt adversarial. I certainly would not call most of my workplaces environments "toxic for creating trusting friendships".

I don't know, maybe you need to be more particular about where you work.