It's a win-win, it's good for Venezuelans and US wants the country to become an ally. People behind the decision probably took both into account.
In principle, it's morally good to overthrow a dictator in some circumstances. The most obvious example is North Korea - if the US had the ability to transition that country into democracy with little risk of something going wrong, they should obviously do that.
In principle, it's morally good to overthrow a dictator in some circumstances. The most obvious example is North Korea - if the US had the ability to transition that country into democracy with little risk of something going wrong, they should obviously do that.