I am not an expert abdominal surgeon. If we are in Antarctica and your appendix becomes inflamed, I will try to save you by cutting it out. But you will probably die.
I am not an expert front-end developer. I make sites for myself, for others, and have even been paid for it a few times. But I know I am basically an amateur. However, my sites are far, far better than almost all sites in the wild, created by teams of full-time, professional front-end developers. They work identically in all browsers, are fast, easy to navigate, and people say they look good. They validate, too, except for a few nonstandard htmx attributes.
There is something very strange in the WWW, when a self-taught amateur like me can make a site that is better than the New York Times’.