Now why can't a Buddha just intercede?
From what the Enlightened Zen Master Huai-Chin Nan said... even the Buddha's cannot penetrate our ignorance and so that is why they provided all these mantras as a means of accessing their consciousness so that they can help us and help us out. It's like a "password" to enter into their system.
In my own words, they can only help us as much as our sincerity, purity and jhana allows them!
From another perspective, isn't it true that we each of us contain the power of gods, the power to become a Buddha?
So how can this god nature this buddha nature be brought out by anyone but itself?
If it was able to be brought out by an "other", this buddha nature that you have within you would not be buddha nature!
It would be "slave nature."
Similarly, you yourself cannot egoistically bring about this buddha nature. Because you (skandhas) are just ego. Everything you are, feel, think... is "false thought".
Just like a Buddha cannot save you, you can't effort yourself into enlightenment. All you as the egoic container can do... is prepare and wait... and even that is not enough.
As the diamond sutra states, it comes without coming... only then is it true coming.
Thus, use that understanding in your own cultivation of effortlessness, because the closer you are to effortlessness, the closer you are to It.
This Buddhism is becoming very Taoist, no?
Another speculations for why the Buddha's might just be "passive" in their universe-saving policies... how is this whole saving business even necessary. Karma is karma. Everyone deserves what they got.
What do you learn more from, hard experiences or easy experiences?
What are you more thankful for, difficulties and failures or easy-gimmes?
Karma is a wonderful educational system that the Buddha's have no need to intercede with.
(I really learned this concept through the Buddhist cosmological analyses given in Mind Experiment by Professor Bavo Lievens.)
They gave their education, it's time for you to play the game and cultivate your own Tao.
Look at some pictures of the Angry Hell Buddha (I forget what it's called).
Anyway, their help is always at your beck and all when you ask with focus, clarity and faith.