it is just that some barns are fulls of rosy cheeked babies, all of 14 and having 8 years under their belts, and fearless and able to ride nearly any horse. that could intimidate anyone.
don't let them or their attitudes affect you. you have to go through the beginner stage whether you are 25 or 55. so, in some ways, you are not able to escape the "I must look like an idiot" stage. and, quite often the older you get, the less stuff there is gumming up your ears and your ego, so you become a better listening student.