Imagine away - I always switch everything off.
My chimney-mounted TV aerial did once get struck by lightning and fused most of the equipment around the TV, and blew the ring-main fuse. Luckily all mendable. It won't happen again because I put a new aerial in the loft.
I don't have a freezer, and empty the fridge. I go on holiday in hot weather, so don't need any central heating then.
If I left the power on, I would worry that some fault would occur and cause a fire.