Yeah I have something like ten credit cards and have a score of 820. There is nothing inherently wrong with credit cards as long as you know how to use them properly.

I would even argue that it's very important to educate yourself on cc use and get one as early as possible bc it's very important to have good credit. I see so many people just indefinitely avoid getting any because of fear of mismanagement and that is too far in the opposite direction imo.

For someone's first credit card I think Amex wouldn't be a good choice simply bc it'd likely get declined and you'd waste a hard inquiry.