On average, the capabilities of most any modern DSLR far outstrip the capabilities of the photographer using it.
The same phenomenon applies to violinists. 99.99999% will never exceed the capabilities of whatever instrument they play. It's the very rare talent like an Itzak Perlman or Issac Stern that can tell and exploit the difference between playing a Stradivarious and something else. And even though they can exploit that difference, 99.9999% of the people listening to them wouldn't know the difference.
My 5D Mark III (and 5D2 before it) produces images that consistenly mange to water my own eyes when I excel in at my job of composing, exposing and processing the image. I'll spend my time and efforts perfecting those skills rather than chasing bits and bytes, thank you very much.