Well, there's always the ubiquitous disclaimer that internet comments and online polls don't necessarily mean anything.
That said, I personally think it's ill-advised because - even leaving aside the knee-jerk dismissal of tradition as a legitimate factor - if you follow with the idea that "devils are corrupters, demons are destroyers," then succubi make much better demons than they do devils.
The idea that succubi - or at least, D&D succubi - use sex and temptation to lead mortals down a dark path always struck me as being misguided. Succubi are there to kill people using sex; that's why they energy drain you with a kiss (or any other carnal act). Most people in the game world are 1st-level, which makes even a single instance of passion with a succubi deadly, and even most heroes won't be able to withstand very much before being reduced to a dead, withered husk.
True, succubi do often use deception to accomplish this, but that's a question of methodology; "destruction" and "corruption" are goals, and are silent as to how those goals are achieved. You can use subterfuge and lies to get into a position to put a knife in someone's back, and they'll be just as dead as if you'd torn their head off; that's the lesson in destruction that succubi showcase.
To me, they've always been quintessential demons; they want you to pucker up and die.
That's only one possible Succubus agenda. One could say the sex isn't just to kill, its to claim a mortals soul, a valueable commodity amoung fiends. Collect enough and the succubus can be transformed into a more powerful form. Also soul stealing, life draining, aren't the onky uses for Succubi, just thier main specialization. There is also concubines for powerful fiends, spys, pact dealers, evanglists for fiend cults, and so on.
It really depends on the Succubus and her goals and inclinations. Some could do it out of hateful spite, murderous rage, ambition, twisted kinkiness, fear of more powerful fiends, instinct, orders from her suppiors, hunger and so on.
Which just supports the idea of Succubi as mercs and thier own race.