If you looked at the gov.uk page [1] that he linked, it is clean and readable. It doesn't look hard to me to make, and I don't think it is lacking functionality.
I'll grant that writing web-apps without a framework is going to be harder for many people (especially with all the fancy features that are expected now days), but that is not the point of this writing. This is an argument that the web (especially government services) should be usable on limited devices too.
Anyways, I disagree with the idea that we should make something simple enough for PSPs and car browsers. Just go to a library.
There are limited resources when developing software. This is a pretty bad resource sink.
You seem to agree with me, but refuse to admit it because you wish the world was different. I do too, but it’s pretty irrelevant.
Everything looks easier from the outside. Maybe we should focus on getting private corps to provide a small amount of accessibility before forcing onerous requirements on our already-underpaid civil servants?