There are about 63 million people in the UK, 38 million people in the UK have a full driving licence. Half of those left are too young to have a driving licence. Some are probably too old, some probably have provisional driving licences.
It's an extremely low barrier for entry to assume that a minister for transport should be able to drive a car. It seems perfectly sensible to me.
Likewise, knowing how to download software is an extremely low barrier to entry for a minister for media. I wouldn't expect them to know how to program but _some_ basic ability to understand a few of the issues they'll be confronted with is surely helpful.