Many are teachers only few are traders. They make their money from selling trading courses, teaching trading classes, creating trading contents for YouTube and other social media. They have their own trading podcasts and collaborate with people like them to talk about trading yet, they have never been successful at trading.
Successful traders are careful about whom to tell and share their stories with, and they seldom show up in public saying they are good traders as they prefer to remain anonymous despite their great achievements. And yes, those illusionists and fake traders have big mouths talking here and there, yet they achieve nothing aside from popularity. That is why I don't admire people who keep proud of themselves because I know that trading is not an easy game but these influencers saying the opposite about it.
Some people say that not all the things and success stories we hear on social media are true, most of them are scripted.
Whether scripted or not, they are exaggerated for sure because any person who shares a success story over the internet would barely let their audience know about their failures which is a flaw in itself. Successful people don't need to hide their failures because they have overcome the failures which is how they got successful. Your success is fake if you are afraid to share your failures, it means you are faking the success and making a fool out of the people you are sharing it with.
As you said, successful people barely need to announce it to the public, they don't need to do that because they know they aren't going to get any benefit out of that. Showing off is never what successful people like to do but it's those who are fake who would show off while using fake stories and stuff.