Yes. They want to employ inexperienced staff that can be brainwashed. Experience and knowledge seems to be frowned upon these days.
Unfortunately, in my experience, it is these newer brainwashed staff that seem to be the most militant and unwilling to be useful
It is recognised that there is a shortage of train drivers in the industry at the moment. The large number of trainees is partly due to (in the North anyway) a Rail North Partnership initiative to support TOCs with training more drivers.
Obviously, if you recruit a qualified driver, they’re productive much quicker than a trainee, but then a TOC somewhere else has to recruit and potentially train another driver
The RNP initiative encourages TOCs to train new unqualified drivers (with a small financial benefit from the government to offset the unproductive period) as this is the most effective means of getting fresh blood into the industry and alleviating the shortage. The alternative is that TOCs train the bare minimum and some TOCs (I.e. Northern) are left to restarting the training cycle.