Don't agree with that, SC.
In any Authority based exam system I've seen the questions are NOT held on the client computer - they're accessed via phone line or internet to an Authority controlled server just prior to sitting the exam. This means that al questions can only those approved by the relevant Authority. If a question is innappropriate then that is purely the Authority's fault for releasing it to the data bank.
Whether a particular question is presented on paper OR on a monitor makes no difference to the vetting it needs & should receive prior to release to use.
Establishing computer based exam centres is easy to do AND relatively cheap. It makes it very viable for exams on demand at reduced cost.
A caveat though: If the examination system is contracted to a commercial organisation to administer then there must be several organisations approved, not just one. A serial monopoly doesn't improve the cost or service.