Re: Probably a simple reason
Surgeons that don't have steady hands cannot practice, they mentor the younger ones, atleast in Canada (not sure in the US). The surgeon that handled the c-section of my eldest boy was 68, had glasses and a steady pair of hands. As he was showing the procedure, there was two others in training (all in their late 30's) and helping out. As I held my wife's hand, the elder surgeon was asking questions and pointing out mistakes of the trainees. Later I asked about the process, apparently they had to be mentored under an experinced surgeon for 5 years before they could go solo just for the c-section.
This raises another thought, if you're specializing in Medicine: 4 yrs in college, 2-4 years in med school + 7 years specialization + 5 years being mentored ~ 20 years. No wonder most of the doctors with specialization are typically in their 40's.
To answer your question, would I hire someone older than me. Definitely. Are you applying? I see little IT pros out there much older than me so the likeihood would be rare. The older IT fellow that we did hire, it was my staff that suggest we keep his resume in the pool for I tossed it out (it read like he was going for my position hence over quialfied and he didn't address the resume to the position). At the interview, I then spotted how he would be useful in many other areas other than the position applied for.
To be fair, if I was interviewing someone for a position and they said they wish to retire in 1-2 years out, I would probably not. The ave staff rotation at the Univ I work at is 5 yrs hence I use the 5 year rule, I need to have the person in for about 5 years. Getting a new person up to speed takes time and energy.