Personally hate them, but I don't have children yet! I think it all depends on what age you get rid of them at. I have a theory that dummy suckers are more likely to get ear infections (just from my observations), speech difficulties (where allowed past one) and a variety of other things. Plus I've seen many parents who just can't get rid of them - toddlers with dummies in all day long are a real pet hate with me - especially when the child tries to talk with the dummy shoved in.
Hun, in the wee hours of the morning when your 4 week old bubba has a pain and wont stop crying - you will try anything to help them get some relief.

I don't agree with your theory whatsoever, and have had 3 kids. If it is based on a medical observation (I dont know your background) - I must be one of the lucky ones.

SophieRose - you try and reduce or take it off him when you think he is ready and able to cope or find comfort in other ways, or perhaps doesnt even want it!! - you can help him cuddle teddies instead, or have a special blankie etc - that bit is entirely up to you and your child.

Currently my #3 will take a dummy to go to bed, but if he wakes for a feed early hours, absolutely refuses it to go back to bed and self settled - weird hey!