Because most wannabees do the IR as a required test on the road to the RHS, the next time they renew is because they have a job and a current Ir is required for them to do the type rating. After that they only renew a multicrew IR. Most of them struggle to work out which way is up in IMC without an AP.
The old hands who came through the ranks doing it the hard way have no fear of hand flying anything from a Cessna to a 747.