This bill (the Online Safety Bill) has a long and politically complicated history. It was originally motivated by the Cameron government's fairly limited desire to mandate that public WiFi had porn filters in place and then seems to have grown over many years to include a huge number of pet projects and power grabs from various career bureaucrats.

I don't think politicians set out to do this but it's been around in some form or other in Whitehall for so long that there's no real responsibility anywhere and it was low priority enough that noone ever thought to properly kill it.

It's very British in that sense.