In my experience most of the older career changers don’t get anywhere near as prepared as they need to be even though they think they are. They are also typically very overconfident probably because of their success in the previous career. When you couple that with the fact that they haven’t been in school in decades so study skills are not really there. All of that in an unforgiving training environment at the regionals usually doesn’t end well for a lot of them. We had a guy who consistently bragged about how experienced he was in a 172. As it turns out he only had 10 hours of multi engine time it was before the rules changed. Failed his oral and could not stop crashing the simulator they released him after sim 2. He didn’t even get to single engine operations just couldn’t handle two engines at the same time.