That is why it is important to keep up with the developments in one's field, even if they don't have a cert. They don't have to attend another course or read another journal, but they can always take an interest in new technology and tinker around on their own. Then, they can put these young inexperienced engineers in their place when they leave their messy arses behind!
But of courses, there are also "experienced" guys who just talk/swagger with more air than a hot-air balloon, and when it comes to getting the job done, they can be just as bad as the inexperienced young ones. Or worse, since they are "uncles" and "aunties" who demand "respect" for their refusal to change/learn.