you asume that AJ didn't paried all through the river, the possiblity of which per yoking's comment's is less than 50%.(or around 50%)
so the spectum could be:
1 . In 50% situation, AJ got a pair
1.1 In X possiblity , AJ lose to random 2p, set, trips, ...
1.2 In 50-X, AJ win
2. In another 50% , AJ stands for A high,
against random villian hands, AJ could win between 36~45(which depends on the possiblity of pair board against non pair board, asume it's 40) out of 100 (per your stats) which in real could be lower due to vilians' hand selection.
SO
2.1Y= villian hands selection discount
2.2 Ahigh with J kicker real win rate =40-Y
Conclusion: your 70 vs 30 PF winrate comes from below 2 contribution:
但是对手 65% 开局后 不可能 bet flop, turn, river 100%
太复杂了 我们简单化一些,就当他 bet flop 100%, turn 平均对手有20%的equity 才会 bet
river 假设 他如果turn bet 了, river 就会 bet 100%
60万次的模拟 hero的EV%在 river 只有 21