Is your hamburger Mt Rushmore McDonald's, Burger King, Wendy's, and Hardee's?
Is your pizza Mt. Rushmore Domino's, Pizza Hut, Papa John's, and Little Caesar's?
Of course not.
Billy Joel and Def Leppard are better than the aforementioned food purveyors but both top out well before the status you'd accord them.
And I did say the Jones Beach show was solid, just not my taste. Kind of like how at the same venue, I liked Dylan way more than Paul Simon in their double bill, but knew that mine was the minority opinion.
And I liked Elvis Costello both times the most.
Btw, Stones Roses is a sold choice. Limited career success, but a masterful lead recording.
For the record, and to be fair, my most preferred regional hero ends up being peak Mellencamp, ultimately preferred over Joel, Springsteen, Petty, Seger, and the many others I'm forgetting or omitting. It's a valid subgenre, and they create great pleasure for their many fans, but it's not mere snobbishness for me to genuinely like many artists much more.
There's lots of areas where I'd easily concede you know much more than I. This isn't one of them.
Finally, I might have quoted
@superjohn's rebuttal instead of yours. Here, he's less right than you are, easily so, and again I write this without my needing to criticize Billy Joel per se.