I agree mostly with your post Iam64 and think it was a big mistake to allow councils to sell their houses.
The only thing I would say, is that Mrs T couldn’t do anything for people who rented privately, so did the only thing she was able to do, by letting long term council tenants buy their homes at low prices.
She thought, that for those people who had always paid their rent and been good tenants and had saved their money, that they should be rewarded.
I think it was an admirable thought, but a wrong thing to do
Overall, as it reduced their housing stock so drastically.
She probably didn’t realise just how many would be sold in this way.