Is This Retired Firefighter's Claim About Putting Out a Car Fire Correct?

[u/AffableEffable]

Hi, I ran into this discussion on twitter, and most people in the comments were really mad at the ELBainter person (who claims to be a retired firefighter). I know absolutely nothing about any of this, so I was curious: are they right and the people there are just stupid, the opposite, or something in between?

[u/Powder4576]

He’s right, at that point 2 dry chem extinguishers is not putting it out and there’s a chance those tires could explode or brakes could fail, just stand back and call 911