I don't see the point.

I have a phone, the person who I would be texting with has a phone, why not just talk on the phone?

I guess if you need to get a hold of someone and you don't have the ability to talk on the phone then maybe it makes sense.

I just don't like the idea of constantly being in contact with anyone and everyone. If someone wants to talk to me, they can call me and leave a voicemail and I'll call them back. Is that so hard?