The best person for the job should get the job regardless of age..no question
And how is that going to be established?
Define "the best" exactly.
Is it best as defined by the corrupt chief pilot and his pet pilots..or his golf companions, or his wife's brothers son? Or the trainer who accepts a small bribe, or the manager who promotes the most company pro pilot, irrespective of safety concerns? Or the 22 year old who can fly a perfect ILS but has zero experience....How does experience fit in with this concept of best?
Or what?
Seniority, and a Command course has its problems, but the alternative is anarchy, and a thief's charter.