Elderly people carry valuable gems of wisdom.
No matter how educated you are, some lessons cannot be learn in classrooms; they are only taught in classroom of life' and are learned by experience.
Whatever things you disagree with or that seem hard for you to understand, keep them in your memory regardless. One day, when you are wiser, you will likely refer to them.
There are some natural remedies to sicknesses and important principles of life that died with some elders because the generation after them did not learn about them when they had the opportunity.
“Before the go to be with the Lord, spend quality time with the elders around you, especially the christian elders to learn all you can. Tell them to teach you some of the things they know and do.”
Memorise: With the ancient is wisdom; and in length of days understanding. Job 12:12 
