What would I do?
#1 - make sure life insurance premiums are paid and current.
#2 - carry bear spray (where legal).
#3 - accept the risk that my life is not certain and that a bear may feel a need to take my life in protection of its own. Death is part of life.
#4 - Stand my ground, fight like hell, play dead, play whatever cards I have and accept my fate, just as my quarry must when I make an attempt on its life.
Personally, I accept that hunting and life in general is one where risk is just part of the deal. I take life and I put mine at risk. I hunt and am willing to be hunted. I offer no invitations to death. But It's no crime for an bear or mountain lion to feed me to its young any more than it's a crime for me to feed a deer to my young. None of us have to make ourselves easy prey. But it's all part of the deal.
I'll not quibble about probabilities since it is not the probability of an attack that is important -- it is the consequences of one. But I've never heard of a black bear do more than just bluff charge unless really provoked. Even the ones up in Yosemite tend to book it away from me as soon as they realize I'm there. I've had some close, scary encounters. But I've never felt threatened enough to draw a pistol on a bear (I'll sometimes carry a pistol in the parks since we can't carry bear spray) -- they value their life just as much as we do and it would be very strange to experience anything otherwise.