I agree with your comment about the futility of this petition. But I think what you wrote about not switching off Freeview is a bit misleading:
The proposal is not to switch off freeview but about the technologies under which freeview is transmitted
The ‘easy read’ version of the summary says:
“We are looking into whether digital terrestrial television, known as Freeview television, should be switched off.”
It goes on to say:
”People usually watch Freeview through an aerial.
People who watch Freeview through an aerial would get help so they could watch TV using other ways, like the internet or a satellite
dish.”
So the proposal is to switch off Freeview through the aerial and deliver it differently. I think most people would understand that as Freeview switch off. Freeview itself says “Freeview is the UK’s digital terrestrial television service.“
Nobody need worry and the petition is a waste of time, but Freeview as we know it will be switched off.