Why I’m so depressed seeing people selling something they don’t understand

Idk if this is related to ADHD or not, but seeing livestream on tiktok people successfully selling something that they themself don’t actually fully understand the product they’re selling is so depressing

I know that’s how they make a living, and it’s not about right or wrong, but seeing too many people like that is so depressing for me and trigger me to delete the app.

Has anyone feel the same way?

In one way, actually that’s a good opportunity to do the same thing, selling via live stream, but I feel like the work is very shallow despite the money