When you’ve been through a house fire, believe me, the last thing you want to do is look on gumtree yup I totally agree.
We had a fire a few years ago. I’d estimate we lost about half of our belongings. It was paid out at £15k for the contents and £30k for the buildings cover. We’d never pay that much in our lifetimes in contents cover. The psychological impact of an event like that can’t be underestimated. We were asleep, the smoke detectors woke us. We were told categorically if we hadn’t had smoke detectors they’d have been pulling our bodies out 
We stayed with my Dad initially but were covered to get a rental house. People say ‘Oh I’d just stay with family’ and while I understand that, it was quite intense anyway but also, the cleaning company cleaned everything they could and then returned it all to us, I think there was 50+ boxes of stuff (some clothes, ornaments, cooking utensils etc) as well as some of the furniture like wardrobes, bed frames. We were able to put it in the spare room of the rental house at least. Redecorating was so difficult too, it was like decorating a blank canvas with no mental energy. So many decisions, we couldn’t always get ‘like for like’ replacements, I lost count of how many times I just said ‘Okay, fine, that’ll do’. We moved house within a couple of years because it never quite felt like home again.
I totally, totally understand that some people can’t afford it. It must be horrible to be in that position. But as someone who had to make use of it, I’ll never be without insurance again!