In a way. A few years ago I was running a very hilly 10k XC race. I was near the topish end of my age group and time was ok. As I went over the last climb, I could see there was no one close behind me and realistically I couldn’t catch the guy ahead, so I coasted the last 500m-1k. As I was driving home, I had a strong feeling of wasted opportunity. What was the point of running the race if I wasn’t going to give it my best effort. That feeling and the desire never to feel it again has been/is a very strong motivator now. If I ever feel myself slacking off, I think back to that moment in the car and kick again. It spilled over into the Mtb races that I have done.
But it hasn’t stopped me from wimping on certain drop offs. But I think that is a different story. At the moment, I have a complete mental block on one run in the Surrey Hills. Only short, steep drop and comfortably rollable but it has me for the moment. Every time I fail to ride it smoothly, I feel irritated at the end of the ride. I really need to just go and session it. But the alternative argument with MTB (and climbing) which has been repeated to me recently, is don’t go for it if your are nor feeling up for it. There is another day and better to ride safely.