I wouldn't say we're afraid. I don't particularly like speaking on the phone though, but it's alright, I even worked call center for a while so it doesn't bother me much these days.
Anyways, essentially texting is just more efficient. I can't speak for everyone else, but for instance at work, I hate it when I have a question or need assistance on a specific topic, ask on my team chat and have a couple of people saying "quick call?".
If it's something really complex, fine... that's fair. Other than that? It's just so inefficient. I can be working on something else and just reply during my off time between tasks, same with whoever I ask help from. Also, most of the time I'm listening to music, or I have my TV with ambience sound on the background. So then I have to turn everything off just so I can go for a 5minute call for something that could be done over chat on the same amount of time.
Sorry this comment turned out way longer than I thought it would.
I get what you mean. Overall, if it's not urgent I'd rather not make/receive calls.