I had a double-ended straight draw on the flop with QJs and a KT6r board. I needed an A or a 9 to make the straight. I was last to act and facing two all-ins. Using the rule of 4 with 8 outs, I know I had about 32% pot equity. Based on how much I had to call, the pot odds were roughly in line with that percentage - I had to be right 32% of the time to break even.
I made the call and my straight draw bricked. Both opponents showed AK and split the pot. Since my opponents were both holding an ace, I actually only had 6 outs or 24% equity.
My question is is it correct to call all-ins on the flop if the pot odds are favorable? Should I consider "blockers" (opponent already holding the draw I need) when making this decision? Should I consider the amount of variance (more variance when the outcome is closer to 50/50)?