There is simply no-incentive to. Generally there are many incentives to increase the number of laws, as they can be seen as doing something about a some recent issue. Many of the recent online safety laws (even before OSA) are good examples of this.

Additionally Britain generally has a problem with politicians believing that the only solution to a problem is banning/regulating things, regardless what the root cause might be. Banning/regulating something requires new legal powers. So more laws.

This been true as far back as I can remember with them talking about banning the Lotus Carlton back in the early 90s because one vehicle the infamous 40RR was used in a spate of ram raids which embarrassed the police. I remember this on the news when I was about 9-10 years old.