Both you and the poster above you may be misunderstanding the point that Jonathan Hall KC appears to be making. If you take a look at what he actually writes [1], then it is pretty clear that he is presenting these hypothetical cases as examples of obvious over-reach.

This is a warning from the independent reviewer that the law is too potentially broad, not an argument to retain these powers.

[1] https://assets.publishing.service.gov.uk/media/69411a3eadb57..., pages 112 and 113