corron10 won the math.
A little self control is called for when semi-bluffing.
It is better to semi-bluff a ragged flop than a flop that has big cards that the blackjack donkeys play.
An example, deep stacked cash sitting in CO with JT.
EP raises to 7, you in CO call, SB calls.
Flop is K Q small rainbow.
SB checks, initial raiser checks.
It is great flop for your hand (but not as good as 98). Semi-bluff here has issues because the big cards are likely cards for SB to have called with or initial raiser to have hit 1.
Turn 9, patience is rewarded and you have hit the "better straight". Now turn bet is called by SB initial raiser folds and you take down a pot where SB can not fold top 2 pair.