I don't remember anyone other than cash-rich BLT landlords who were able to pick up bargains, enjoying the last house price crash
Not true.
My MIL bought a flat in the last 'crash' (well, more like temporary drop), in about 2012. She bought for 160K, down from 185K in 2007, so a drop of about 15%.
In summer 2017, an identical flat sold for 303K, so a rise of about 90% in 5 years.
She is not a BTL landlord.
In the crash before that, I know absolutely loads and loads of ordinary people who were able to buy places when prices fell.
In the period 1995-6, when prices were at rock bottom, I know loads of ordinary people who bought flats in London zones 2-3 for 60-80K (in some very nice areas eg Primrose Hill and Chalk Farm for 80K!). Not one a BTL landlord!