Right now, it looks like 2016 cladding is to blame, not 1970s design and construction. We need stronger refurbishment standards and more sustainable funding models for regeneration schemes, not mass demolition.
In 2015 the London Assembly report 'Knock it down or do it up' calculated a net loss of 8,000 socially rented homes in London since 2005. This is in small part due to right-to-buy, but largely because of regeneration programmes that demolish social homes and replace them with flats for private sale. Many of those new high rise flats for private sale are left empty, as cash deposit boxes for international investors.
Please, don't jump to blame 70s architecture and engineering. Mass demolition without complete reform of housing policy will cause more problems than it solves.