Elton John is not a good songwriter
Exhibit A: “If I was a sculptor. But then again, no.”
Exhibit B: “Mars ain’t the kind of place to raise your kids. In fact, it’s cold as hell. And there’s no one around to raise them if you did.”
Exhibit C: “The years went by and the rock just died. Suzie went and left us for some foreign guy.”
A good singer, yes. A good performer, unquestionably. Songwriting? Iffy.