Had enough of house sharing at uni. You are quite correct - it's crap.
Living at home with my mum is also house sharing

It's not crap; we're both happy to share the place. It also costs me a lot less, and benefits mum who doesn't drive (etc, etc).
Mum & dad aren't together, so mum would be alone if I moved it. In fact she's said she'd not be able to keep the place together on her own, so she'd have to move into a small one-bedroom flat.
I'd have to house-share with strangers - and that has many complications. I have an indoor cat, who I will not be parting with under any circumstances. What are the chances of finding 1. a house that allows pets, 2. flat-mates that like cats & 3. flat-mates who will take care not to let the cat out?
Realistically, house-sharing is not an option. No, I will not abandon my little furball.