HH is saying some more words about the subject, as i understand it - i cant just pray, cant just sit and repeat mantras and hope that ill be world savior.
That wont make a change for world, nor for society, to make the change i have to develop bodhicitta and practice compasion and altruism.
Since 5 mental poisons are within me, i cannot put resposibility for beeing bad human to some outside beeings, constructs or teachers, however u call it. It is on each of us. So no Budda nor Boddhisattva will do the trick instead of me.
But at the same time i can learn from them, i can pray to them, i can follow them - this will make a change within me, which is the first step in changing the world.
This is great teaching, since emptiness and compassion are going hand by hand.
There are so many activities that can "heal the world, make it better place" that everyone can find something fitting for sure. I dont even feel like answering your second question is needed, its enough as a mirror in which we can check ourselves