OK, here is a proposition. Paul probably had reached a state where he fully realised the limitations and weaknesses of himself. He knows he can't measure up to Jesus.
But he seems to also recognise that people are different and tries to make allowances. (see an earlier post of Klub's)
I'm may know where my own "comfort zones" exist (and belive me - I've been as sort of disaster to even experiencing the sort of pin drop twice with the silience and then standing ovation - I know the temptations music can be both in the ways of seeking audience approval and of in a limited way, musical competence.
But should one not want to learn they need to shut out their own "delusions of grandeur" out. Should one not try to give to God as best as they know how?
Should we really be writing legislature on this?
I think Paul had realised that nothing on this earth could possibly measure up to Christ. It's his estimation of that One that forms his view of everything else - all his status and education. The measure, the benchmark, is always Jesus, not ourselves.
"But surely I count also all things to be loss on account of the excellency of the knowledge of Christ Jesus my Lord, on account of whom I have suffered the loss of all, and count them to be filth, that I may gain Christ..." (Philippians 3:8).
Paul does make allowances, but we have to see that this is in the sphere of everyday life - not in the service of God in the assembly. What is natural belongs to everyday life, things like eating and drinking. But we don't bring that into the service of God in the assembly. Paul had to take that up with the Corinthians, they were carnal, and as a result they were mixing up the natural with the spiritual.
"When ye come therefore together into one place, it is not to eat the Lord's supper. For each one in eating takes his *own* supper before others, and one is hungry and another drinks to excess. Have ye not then houses for eating and drinking? or do ye despise the assembly of God, and put to shame them who have not? What shall I say to you? shall I praise you? In this point I do not praise." - 1 Corinthians 11:20-22
Not everyone has this or that natural talent - are we going to put those to shame who are poor in that way, those who have not?
Paul also says this:
"But that which is spiritual was not first, but that which is natural, then that which is spiritual:..." (1 Corinthians 15:46)
"But this I say, brethren, that flesh and blood cannot inherit God's kingdom, nor does corruption inherit incorruptibility." (1 Corinthians 15:50)
These scriptures, and many others, show us that what's natural - what came first - has no place in spiritual worship. That's why none of the elements of Jewish worship are ever brought into Christian worship. The two are distinct. We get that teaching in Hebrews.