I'm not sure I agree with you there - it's part of being a parent. Being a parent means having that time with your DCs and that's important. It also enables the ex to work and not worry about childcare. There are so many threads on here from people in relationships who can't work because their partner is working - and that stops them from working - or they have to pay for childcare.
I agree, contact time is very important, but to me, the reason or motivation behind it is for the child to see the NRP, to have a relationship with the, not as a favour to the ex.
And If contact time with NRP is seen as childcare time for the RP to work, what happens when NRPs like the one in the OP decided his ex is working too many hours, that she should be at home with his dc more, or that he wants to increase his own hours, and just stops providing that too?
I know not all NRPs would do this, but there's plenty who withdraw financial support for their dc because they don't agree with ex's lifestyle so I'm sure there's plenty who would piss about with contact if they saw it as something they do to benefit the ex, rather than their dc.
I am sure many ex partners would like the opportunity to work rather than worry about looking after their DCs and the potential costs of that - by lost earnings or childcare.
But would many ex partners be comfortable putting their ability to be at work and what hours they can do in the hands of an ex who has withdrawn financial support for the dc and could withdraw the childcare they provide too?
For the other parent, it can be valuable chance to spend time with their DCs - who they may not see enough anyway. But we also know that having that time can come at a cost - parents who prioritise children over work pay a financial price.
It counts on both parents agreeing and being totally cooperative I suppose, I just think that the type of NRP who is happy to stop paying cos he feels his ex is greedy will also be happy to stop providing that childcare too. That if he sees CMS as a benefit for his ex rather than his dc, then he'll see that contact time as a benefit for his ex rather than his dc too.
Contact time should be for the benefit of the relationship with dc imo.