>But I don't think advancing said doctors was a dirct demand from USA.

It wasn't a direct demand of the USA, but a liberal turn was an attempt to get as competitive as the USA without dismantling the system completely.

Dumb Gorby didn't understand that the entirety of the system was built on
layers upon layers of lies, and once the veil of lies had been removed, the system collapsed.

Without the US pressuring USSR militarily, economically, and ideologically, there would be no need for people in power to change anything at all.