[happytoexplain]

Many people (most?) consider "Machiavellian" to be an insult - essentially synonymous to "smart but immoral". Part of the West's ideology, for better or worse, is the idealistic belief that smartness and simple prudence/shrewdness can be separated from the negative aspects of Machiavellianism.

[robbedpeter]

There's also recognition of the valid circumstance in which you're presented with choosing a lesser evil. If all choices are bad, choose the least bad, and those contexts change radically over different time frames.