Six point demand had nothing to do in independent Bangladesh as Bangladesh was a small country comprising homogeneous Bengali people so no worries about bad treatment or injustice. If
It could safe Pakistanis from humiliation with a honorable disintegration from east Pakistan .
It was a lost cause after 1966 anyway..
All India radio's begali service was started and listened by every Bengali like religious ritual.. From there the brainwashing and propaganda started.
Begalis same as Pushtoons are one of the most gullible people on the planet who don't know that they are gullible.
KGB had formulated and trained the propaganda regime for India and it worked wonders...
300 Million annual Jute production was all the East Pakistan had to offer, the bulk of the budget came from Industrial bases in West Pakistan.
Apart from that East west trade benefited both parts as both did not have to lose foreign exchange by importing the goods from abroad and instead bought from each other.
In November 1970 The time was perfect. Bhola Cyclone devastated East Pakistan . The cyclone was a world record breaker and submerged 45% ob East Pakistan's dry land.
After such a mega natural disaster, people of East Pakistan were told that Pkaistan army is not coming to help them, when the reality was different. Yehya know how big was the disaster and had called international help which arrived. Along with Foreign aid in men and material, the Pakistan army was making advances in helping the Bengali people.
But then Mujeeb's India backed machinery jumped in.. Aid convoys were attacked , pictures of dead bodies alongside waterways were shown to the world and bengali people as heaps of bengali dead bodies after Pakistan army massacred them. Those picture float even today, you can google them.
None of the dead bodies have bullet or torture wounds, as have telltale signs of dying by Drowning or hypothermia as a result of cyclone and floods.
Bengalis being gullible, bought that and joined Mukti Bahini in their tens of thousands, and it was no more a war worth fighting for.
When a 13 year old brain washed Mukti Bahini was attacking a trained Pakistan army soldier, the soldier still saw him as a kid not a rebel and did not want to fight him..
All that lead to surrender which was the best option and i am thankful and happy they did so.