Percentage of winnings from high pocket pairs

Over 5300 hands at .50/1.00, my winnings were $494. (yes, I was running hot there)

$123 of that was from pocket aces.
$60 was from pocket kings.
$87 from pocket queens.
$53 from pocket jacks.

2/3 of my total winnings came from high pocket pairs! Is this normal?

If it is, it means that any time you have a stretch of hundreds of hands where you barely get any high pocket pairs, you are likely to lose money or just break even, if all else is equal.

[stlip]

sort of makes you wonder UTG why you would bet anything but AA-JJ or AK.

I've got almost 40,000 hands at 1/2 and $2,400 of my $2,700 in winnings come from AA, KK, and QQ.

Heh, well, there is one probably obvious point here which I will make anyway. If you played nothing but the super premium hands, you would be a big loser over time, due to the blinds. Because of course you didn't just win $2700, you won way more than that but bled away a lot of it all the times you paid the blinds and didn't win the hand (most of the time).