Because we are confronted with the problem of death. What they are discussing is what should happen or may happen, what is possible or may be possible to mankind, not to you or to me.
That is tricky and is misleading because even though mankind could be said to have ventured to the moon for example, I, individually have not made the journey.
As for example we have computers but I cannot make not even the smallest screw in one of the devices. It is not an accomplishment for me.
If humans life for say another billion years, that is not an individual achievement. I may be eating dynasaur shit when I eat an apple, but the dynasaur who shitted is not here to identify the achievement.
Pride in being part of humanity is horseshit.
_Still it is a wonderful video because it gives some idea of what the leading scientific minds are thinking. What they think does impact us.
Man as a collective is not the same as man the individual. That is my point. inSelf Yoga™ concerns man the individual, because group consciousness is a farce more or less.
Nature will not allow the persons (collective mankind) who die in an atomic explosion to pass away collectively. The experience is individual for each. Group security is not allowed.