ubiq: Let me inform you otherwise. You likely exaggerate the mishkov zochor frequency and you might underestimate the eishes ish instances. (Speak to Rabbonim in the parsha and they can sadly inform you what’s going on.) Most otherwise frum men with SSA do not engage in mishkov zochor. And, likewise, most otherwise frum men with a taaiva for eishes ish do not engage in that.
According to current secular scientific surveys, 2% of men are exclusively homosexual. (I’d very strongly argue for several very good reasons that stat is a gross exaggeration, but for purposes of our discussion we’ll go with this figure.) Assuming 2% of frum men have exclusive SSA, we can also count on that most of those frum men refrain from mishkav zochor, given the terrible sin it is. Same with eishes ish. But eishes ish is a taaiva of the other 98% of men. So it is approximately 50 men with eishes ish taaivos to every 1 man with exclusive homosexual taaivos. (Again, approximately. Don’t get hung up whether it’s 50 to 1 or if it is 47 to 1 or whatever.) Even if you assume more men with exclusive SSA sin than other men, given such a huge disparity in comparative starting populations, the larger percentage of SSA sinners will still be a vastly smaller number of actual persons than the smaller percentage of non-SSA (exclusive) sinners.
P.S. Chazal say that a special taaiva for eishes ish (rather than for other single women) is definitely a thing that exists, and is not a negligible taaiva. But this Chazal isn’t even necessary to consider to accept my preceding points. It’s just another cherry on the top.