The only thing in my head is....., girls, girls, girls!!!
Some things just never change?!?! LoL
And a camera or better lens may not directly do squat for your composition but it could certainly drive you to being more creative, thus fueling a drive for more composition.
And yes, a better camera may in itself not make you a better photographer but it WILL ABSOLUTELY make your photographs look better.
Consider the purchase of a Lens Baby. Suddenly you have the same composition appearing completely different and inspiring more creative compositions.
Or the purchase of a Macro lens, suddenly there is a completely new genre just opened up to you that you have never even experienced before. Encouraging you to go on a tear of new subjects and composition conquests.
A new camera with twice the mp and 80 focus points. Suddenly your portraits are dead sharp on the eye on all 1000 shots, not just 250 because before you had to do a primitive re-compose on EVERY shot! And those extra 25 mp allow you to crop 30% and your bird shots are still SHARPER than a tight shot with your old camera.
If you don't think that everything I mentioned will not carry over and make you a better photographer, then you have a awful lot to still learn.
All of the above have made my photography better, so no, I will not apologize that I shoot with a Canon 5Ds.
And those that make statements like the one you posted, their minds are already closed to more learning and their photography will stagnate and improve slowly at best.
But what is MY mind full of, sorry, but it's still, girls, girls and more girls....., why...., because I'm not dead yet!!!
Now go out and buy some motivation!
SS
Next question?!?!?! LoL