I haven't seen the programme, but think SP is coming from the vantage point that parents should be informed of what it can be like to go ahead with pregnancy if DS is v.likely. She'll know that not all kids will function as well as hers, but most people will have had the worst case scenario rammed down their throats before making a 'choice'.
If you seriously think parents whose babies have a diagnosis or suspicion of serious illness are routinely told of any positives by their HCP, you are naive at best, deluded at worst.
I don't base this on tv, or anecdotes but on my personal experience at one of our 'leading' hospitals relatively recently. The first consultant cried (understandably, our child had a condition that pretty much guarantees death in this country). The second consultant (who we expected to confirm things), misdiagnosed based on a Wikipedia page about my disability which cannot be passed on. He is v.v.senior in pre-natal diagnosis in that hospital. It was only when we pushed for a scan at Mr Nicolaides clinic in another hospital that he accepted he was wrong - he then pushed termination on us at every opportunity. Every conversation was about if we'd decided yet, he bullied and tried to manipulate us. He even boasted another couple were in the same situation as us and he was on a mission "to make them see sense". He became completely unreasonable and also told us he did not want us at the hospital, but would only suggest we go to a local small hospital where there were no ventilator (in the possible event baby did not die - which he did not, until we chose to take him off the ventilator - and yes, that choice was largely down to the sheer force of pressure the hospital, including the Head of FM put us under). It wasn't just him (horrible man) but pretty much the whole FMU.
Having done further research I am now aware there is a specialist in the condition at Birmingham, and both there and elsewhere (mainly the States, and some parts of the Middle East) things would have been dealt with very differently both during and after pregnancy - and our son might have had a chance to live.
Sorry if I seem emotional. Fact is, consultants and other staff will not give you all the info other than a leaflet on termination. Presumably they don't have time to talk through the condition diagnosed, and sometimes don't seem to know who you can talk to about the condition (certainly had no clue with us). When we asked if they would be willing to communicate with another consultant who specialises in the condition they refused and pushed all the harder for termination all the way until 37wks. This was all quite recent, not historic, and the consultants we dealt with are still there, in what is regarded as one of the best hospitals in the country - I still have screaming (literally) nightmares about the place.
As an aside, my disability is something I was born with, and causes me a huge amount of pain which I hide well. This has not stopped school peers, or work colleagues telling me that "people like you should be aborted", purely because I have a disability. I did/do not have obvious concessions, worked hard, paid taxes etc, but that's not enough for people who think I shouldn't exist. However, I do believe choice should be just that, a choice. But in order to have a choice, you first need to be educated in best/worst scenarios and termination - not either/or.