Would you be open to dating someone that you never spoke to? Let's say that you met someone online or you're being set up on a blind date. Would you talk to them on the phone before meeting? Many times people meet someone online or are set up, etc. and they never have a first conversation on the telephone before meeting. Many times, they'll even text back and forth or send emails to each other, but still never speak on the phone. Within a moment of hearing someone's voice on the phone, you can tell a lot. There's a lot behind someone's voice.
Sometimes people's voices annoy you and you can't stand them. If you think about it, when you were in your mother's womb, she likely would talk and sing, and you'd hear her voice echo inside her womb. You got used to your mother's voice and it's likely, that her voice doesn't annoy you. The same goes for people that have been in your life for a long period of time, like family, siblings, etc. I think it's so important that two people have a conversation before actually meeting in person. If you don't like a person's voice and energy on a first phone call, you'll know right off the bat that it's not going to go anywhere, and there's no need to actually meet.
There doesn't need to be a long, lengthy conversation, but enough to get an idea if their voice annoys you, their voice is pleasant to you, and more than anything, you should get an idea if you're both dating with the same intentions, and want similar things. Having a first phone call doesn't have to be an uncomfortable thing. However, that may be what you're experiencing, which is making you avoid that first conversation. Some people tend to get a little shy during that first conversation, and even on the first date. There's nothing wrong with being a little shy at first. This is a new situation and it takes time to feel comfortable with one another. As long as you're not too shy, that you don't speak. The more you talk with one another, the more comfortable you'll get, and the more that you'll be able to see if you're a good match or not.