So do you respect 12-year-olds as much as you respect 25-year-olds? Do you respect the opinions on work and adult responsibilities of a 23-year-old as much as those of a 35-year-old? Do you trust the professional judgment of a junior engineer as much as that of a senior engineer?
Older people, in general, know more and have better judgment than younger people.
You're conflating age with wisdom - a common fallacy when charisma is valued over education, leading to Septuagenarian Heads of State ruling on partisan lines rather than Technocratic and egalitarian governance.
Older people, in general, know more and have better judgment than younger people.