You got really good at something. Studied, practiced, failed, ultimately succeeded. Now you’re in, part of the club.
The door doesn’t close behind you. Others will try to walk “your” path.
They may walk it better.
Getting “it,” then telling the next generation they’re pretenders is no good. More often than not, it’s a defense mechanism rooted in not wanting to believe that someone else can do what you do.
That’s a small mindset. There was a time when you couldn’t do what you do either, and if you’re growing, there are more of those days on the horizon.