Sure to your last point, I agree. But only to the same extent as someone like Simon Reeves did in his Cornwall documentaries.
(Which, if you haven't seen them, are very good on how a county can be a glorious holiday destination and also one of the poorest parts of the country -- he had a whole long concentration on seasonal workers living in caravans/ sheds/makeshift accommodation because they can't afford local rents, and a Newquay hotel which wasn't filling its rooms and was instead offering them as emergency accommodation for homeless people, and a very cool man who ran a foodbank in Camborne (Cambourne?) who ended up getting a huge number of donations from viewers of the programme.)
And I suppose one wants to point out that SR has actually been a knife-carrying teenage runaway with a criminal record and an unsafe home, significant MH problems, and a generally crappy start, with no inventions or embellishments. His sense of social responsibility seems to stem from that, and I like that about his travel programmes. It's not bolted on. Whereas I do feel that it is in TSP.
I assume the Cornwall programmes are on the iPlayer.
I'm less sure about the CBD awareness-raising. I don't know how much money the Walkers raised, and obviously that can never be a bad thing. But the PSPA charity clearly decided immediately that whatever they had done for the charity didn't outweigh bringing its name into disrepute...?
I know some people were critical of them for dropping the Walkers so fast, but I suppose I see their point.
An investigative journalist credibly casting significant doubt on TW's diagnosis and uncovering that SW embezzled a significant sum of money in a situation of trust and lied about it in her bestseller, both arguably removes the whole reason why they would have been high-profile ambassadors for the charity, and would stoke public distrust of what might happen to any donations made as a result of the Walkers' fundraising.
I don't know about the SWCP awareness-raising, either. Isn't it suffering from bad erosion because of the sheer numbers using it? I can't remember whether SW talks about that in TSP, but it comes up more than once in Simon Armitage's Walking Away, that sections of the path have had to be 'migrated' inland because of erosion, and the problems that causes with landowners, permissions etc.