'No' vs Babywearing

I babywear my son when we go shopping, it keeps him close to me, I can still grab stuff I need, and I know he isn't running around with the risk of getting lost. I was told that I need to teach him the word no, and then he wont get lost, and he wont be attached to me. 1) No, doesn't work for a nearly 22 month old, it just upsets, and then they are back to what they were doing. I honestly think this word is very ineffective and should be used sparingly. 2) I ENJOY wearing my son, and he enjoys it too. We are both comfortable doing it, and honestly in a year or so he will be too big/wont want to..I have absolutely NO issue with his being attached.