Indeed. To avoid the hack a Shaq all you need to do is be able to hit ~57% of your free throws consistently for it to on average be a bad strategy against us. That's because we average 1.136 points per possession on offense.
57% on average from the line results in (.57)*(2)=1.14 points per possession when fouled.
Now it's important to remember that's just an expected value and if there's a lot of variance in the free throw shooters percentage (i.e. they have a lot of times where they miss both cancelled out by a lot of times making both) then it can still be an effective strategy in spurts, but it is little more than rolling the dice for a guy who can hit 57% over a large span
So it's really not a high bar. And tbh it slows the game down which our guys prefer anyway. No long rebounds leading to transition offense. So there are definitely negatives to the strategy even with bad FT shooters
It's actually even better than that - teams do worse on offense (by nearly 0.1 PPP) on possessions after FTs, because the defense has time to get set (no fast breaks after FTs).
So it's closer to 0.52 or so.