OMG - either this was a GF comment or a view from back in the 1950's, or maybe I'm just reading it wrong!! It assumes the DF only wants a peripheral role in their DCs lives for a few hours a week
It my be an "old fashioned" view, daisy, but it isn't that unusual, based on comments I've read here on MN, and more widely.
The problem is, even if, as you so rightly say, dads want more involvement, and there is evidence to support it's value to DCs, unless both parents are willing to activity support and implement it, I think that the value to the DCs is limited.
Having read some of the drawn out, hostile and downright nasty court cases that take place, I often wonder about the value of enforced contact between a DC and their dad over and above the contact that their mum is willing to offer.
In the OPs case, would it be better that the OPs DSS has contact with his Dad in a way and at a frequency that his mum is comfortable with, or will enforced contact ordered by the court - that creates hostility between the parents and emotional turmoil (and subsequent behaviour and associated issues) for the DC - be more valuable to the DSS in the long term?
I fully agree that the ideal is that the DC spends frequent, meaningful time with both parents, but when one parent doesn't agree with that, does it continue to be of value to the DC?