Someone attacked me personally and the SEO industry on another sub, just need some validation

Posted something on another sub (r/smallbusiness), and some person voiced their opinion on me and other SEO's:

"Pot calling kettle black much?

SEO is the biggest internet snake oil industry ever. The only useful knowledge to ever come out of that industry is “be descriptive on your website”.

This person is clearly wrong, but it just goes to show our reputation that we get because of ignorance, and the bad apples.

I feel angry and personally attacked, so just need some support from my SEO bros (& ladies). :)