I haven't read through the whole thread and the discussion may have changed slightly...
Regarding the article and the 8am to 6pm issue, it's not exactly new, is it? A '9-to-5' job has been fairly standard for many years, so if a parent has one of those average jobs then of course they probably need to drop their child off some time between 8am and 8:30am and collect them some time between 5:30pm and 6pm. However hours can run longer than that and I don't find 9-to-5 to be so standard anymore, and commuting a longer distance is more common, so this will only add to the hours that a child needs wraparound care.
You can be working full time, above minimum wage (let's say £10/hour, for example, or even £15/hour, probably even at more than that depending on where you are in the country), but there would still be no way one wage could support a family - even with just one child - without government support. So of course both parents have to work. One parent might be able to get flexible hours or work fewer hours, but none of that is guaranteed - their careers may not be accommodating, there may not be much in the way of alternative jobs, they may not be able to afford the cut.
I'm not saying it's ideal but at the same time it's not awful - I was a child in the 90s and did the same, some children came to afterschool club purely for fun as so many of us went after school. But as a child it was also tiring at times not being able to go home until after 6pm. In my early teens I got a house key and looked after myself - not everyone would have agreed with it, but I was much happier that way.
It would be nice to have some choice, some flexibility, for parents. At current you have to have at least one partner earning a wage that is well above the national average in order to have a parent on hand immediately before and after school, or at least be lucky enough to find a very flexible job. When I think back to my grandparents, my DGM worked and then became a SAHM until my DM and siblings were school age. She had 3 close together and took something like 6-7 years out of work, whilst my grandad continued with his business - he was self-employed, they weren't wealthy! She was able to make some extra money doing basic admin from home, like letter stuffing, when they were coming up to big events like Christmas. She returned to work part time when the children were at school, so that she could be at home before and after school. I just don't see that being common today, they managed it not because they were incredibly frugal and sacrificed everything, they were sensible, of course, but costs were just lower and expectations different.