An older person is not necessarily a spiritual elder. We do not look to the age of a person’s physical body when determining their spiritual maturity. Of course, we owe a certain amount of respect to the aged by virtue of their seniority; but they may not necessarily be our elder in the things of the Lord.
One can be older chronologically and be quite immature in spiritual matters. Likewise, a relatively young man or woman can have a deep relationship with the Lord and be light years ahead of those two or three times their age. A young man or woman who knows God is more elder than a senior citizen who does not know God. We cannot judge by the flesh, or we will be misled.