Union can probably get all/most the info about sick calls, fatigues, ASAPS, NASA forms, training failures and break down the info based on whatever metric they'd like.

The fact that we aren't seeing a data driven campaign by the union saying "see, a 70 year old pilot is just as safe, productive, and trainable as a 40 year old" tells me all I need to know.

Age-related cognitive decline is a fact of life.
The argument of "if I can hold a medical then I'm good" is garbage. Come take a medical in Oklahoma City and get back to me.