I don't see it as a sign of weakness- as a sub I've asked for advice and also given it and found it was helpful in both ways. I think if less experienced Doms do ask for advice from their more experienced counterparts it can only be a good thing too.

If nothing else asking advice from people can give a different and wider perspective on something and can help growth which is always helpful. I think some of the biggest issues/problems/difficulties can come from living in a bubble and believing only you know the right way.