No, of course its not unimportant. I just believe that there are way more important structural issues with how we play that should be addressed before discussing if we would perform better with a single or double pivot.
And I am not going to bring up City, we play a completely different system and I am very much against comparing us to teams that play a completely different type of football structurally.
I do think that players like Lingard and Pogba would do better in a more offensive system though.
I don't disagree we have more strucural issues. No one will disagree about that.
However, in order to get 100% of all your players you will need to play them in position they are familial with and that will require you to sacrifice some for others. It's pointless to play all your best players while putting them out of position, you will get about 50% of them.
Lingard is better centrally, but since we need Pogba in 4-3-3 and Lingard output is underwhelming anyway, the more logical choice is to sacrifice him for a proper RW to still get the best out of Pogba, instead of changing the formation that doesn't suit your arguably best player.
Of course you'll need to have a coherent system with all this but these are also important.