This exact argument applies to caller ID too. If you pick up you will hear their voice or they will tell you where they are calling from. Still would rather have caller ID.

I can read why you're calling in 3 seconds and it takes no mental energy if I don't care. If I talk to you I need to use significantly more mental energy and it's more disruptive to anything I was focusing on. The people I least want to talk to are the most likely to call, and are the ones who will be the least direct about why they're calling and waste the most of my time.

Not wanting to talk to you on the phone is not the same as not communicating. The vast majority of phone calls are basically someone saying "stop what you're doing, what I want to talk to you about is more important" and they're wrong.

I wish they never invented mobile phones, my wage doesn't justify being bothered outside of work.

You're right that people avoid talking to people nowadays, preferring a text or an email or whatever. But that's not the point here, it's being interrupted from whatever you're doing to answer the phone for no reason. Modern autodialers make calls continuously, and when someone answers they feed the call to whichever telemarketer in the room is open. If they're all occupied the machine just hangs up, but it keeps dialing because they don't want to pay their minimum wage workers to sit idle for precious seconds. So for that reason people out in the world have to stop what they're doing to pick up the phone, say "Hello" and hear nothing but dead air and then a click. It's the tech equivalent of kids ringing people's doorbells and running away, except for profit. Fuck that crap.