We have both in our household
I wouldn't want to do my wifes job and she couldn't do mine (eyesight isn't good enough).
The biggest stumbling block to becoming a driver is passing the "Train Drivers Assessment" at one of the regional centres, fail it twice and you can't ever apply again.
Strangely in recent years we have found more and more pilots applying for driver's positions at our depot as they find the fixed rest day pattern attractive, and of course the pay isn't bad either
Of course there is a huge downside to driving trains, which some drivers never recover from.