Well, it shouldnt be about states of consciousness - amazing though they may be, its just scenery. It is of course good to get confirmatory experiences but they should not be something you look for, because at some stage of the game it will wind up limiting you. It is really about cultivating yourself, cultivating mindfulness, heartfulness - "Buddha is as Buddha does," pretty much. The ego should be attenuated so that wisdom is developed, it is a necessary component for internal power, for "with great power comes great responsibility."
What I think would be a good descriptor...I read on zerohedge a while back, I dont recall who wrote it, I liked it enough to swipe it as my signature:
"Even in mildly complex systems, any
outcome is the wrong thing to target, with
the process being where the focus should be." (Which you can see by all the financial problems in the world today, central banks and governments are increasingly focused on the outcome, at the explicit expense of the fundamentals! Which means it is only a matter of time before bad things happen when one ignores the fundamentals.)
To apply that to qigong and meditation, it is the fundamentals you should be cultivating. Moving qigong to develop a strong vehicle that can withstand long periods of meditation; a calm mind that can harvest the cultivated energy.
Or as was written in taoist yoga,
"The cultivation of immortality does not go beyond spirit and vitality."
Another analogy,
"Before enlightenment, carry water, chop wood; after enlightenment, carry water, chop wood."
The fundamentals you practice today will also be the fundamentals you practice when the light shines through.
So to sum up your teacher's advice,
Dont use meditation to become a bliss junkie. There is so much more than states of bliss, if you chase bliss then that is its own dead end of a rabbit hole one can enter.
Even in mildly complex systems, any outcome is the wrong thing to target, with the process being where the focus should be.