I probably wouldn't have volunteered any info because I have far too often been on the receiving end of unasked for and unwanted "help" and it drives me crazy! I've been sewing for over 45 years so I generally know what I'm doing, even if someone else doesn't think so.
However, if asked or even in general discussion about the project while waiting in line, I'm happy to offer my opinion or share my experiences. I don't like it when I see someone making what I think of as mistake but with my hearing impairment, chances are I missed an essential part of the conversation.