You can still be a good mum and use a dummy!! All of mine have had dummies, DD1 spat hers at 6 months but the other 2 had them for much longer. it settled them and stopped the comfort sucking on me so I found them a godsend.
Motherhood is filled with people who will try to make you feel bad for something so you just need to touh it out and maek your own decisions based on whats best for you and your bub! Having had 3 kids I now realise that they are all so different that you can never make blanket statements about what is good or bad!