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(Warning: I'm talking out of my ass here, I am not a biology student of any kind.)
Our tastes evolved during very different times than today. Human intelligence changed all the rules of the game.
During the time when our tastes evolved, salt could be a very difficult thing to get. And yet, it's so biologically useful that we can't live without it. (As any Star Trek TOS viewer knows, if your body is depleted of salt, you die.)
Before intelligence, our instincts had to drive us to get salt at any cost. After intelligence, salt becomes so plentiful that it costs pennies for a pound of it.
The same would apply for good sources of energy: fat and sugar. Getting sugar was probably not as easy for early man as it is today, because fruit would not be available year-round. Also, modern fruits contain more sugar than their earlier counterparts due to human influences. They've been bred to be sweeter.
Getting protein and fats and amino acids would have involved a lot of work and maybe early tribal instincts like pack hunting and such. Figure it would easy for early man to forage for foods, but more difficult to get fresh kills, much less carefully trimmed aged marbled beef under cellophane. So the instincts say to go hunting instead of just having another go at the apple core or whatever's left lying around the cave.
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