Of course there can be value in taboos. That stands to reason. However, is it not better that those taboos are based on reason rather than superstition? Apart from anything else, if they are based on superstition, it quickly becomes evident that they hold no power.
As for the fractured logic that leads Theland to conclude secularism is responsible for the lack of plod on the streets, it seems a little unlikely to me that there's any causal relationship between the two.
A more significant factor might be Thatcher's famous declaration that there was 'no such thing as society' and the promotion of me, me, me culture. The Tory Party, of course, has often been described as the political wing of the CoE. (Of course, I expect Theland will say they're not *proper* Christians in the CoE.)
Interesting too that Theland dreams of a "Songs Of Praise," style churches, with sunday schools, W.I. Boy Scouts and Girl Guides", given that to whatever extent such a romanticised view ever did exist (much like Thatcher's invocations of Churchillian Britain, it's at least 50% myth), it did so as a direct consequence of the Enlightenment, not in spite of it.
Personally, I'd far rather live in a society based on respect than one based on fear.