But you still haven't said why you think that Romans 14:6 relates to the topic.
I would offer It has to do with ceremonial eating and drinking. Shadows and types used in parables . . . a sign to the unbelieving world. Believers have prophecy
Ceremonial laws used as parables, witnessed in John 4 .
The other apostles in hunger went to Mc Donald's when returned asked if Jesus was hungry Jesus spoke of the spiritual food the meat of the word the powerful let there be will of the Holy Father
John 4:31-34;In the mean while his disciples prayed him, saying, Master, eat.;But he said unto them, I have meat to eat that ye know not of.Therefore said the disciples one to another, Hath any man brought him ought to eat?;Jesus saith unto them, My meat (power) is to (both) do the will of him that sent me (#1), and to finish his work.(2#) . . . . . . . one work two fold
Ceremonial shadows of the invisible eternal. In that way we cannot judge one another
Same with the ceremonial sabbath baptism when Aarons two sons added to sola scriptura making it a sign to themselves. The fire consumed them not a hint of smoke on the ceremonial attire. It remained a shadow as sign to the pagan kingdoms. Believers have prophecy.
Roman 14 :6;He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.