Well, it is ... but it can also sometimes be a less-than-optimal or even misguided term, in that it can mislead less experienced traders into imagining that they should always be looking for trade entries which have a greater than 50% chance of leading to a winning trade, ignoring the reality that lower win-rate methods (with higher R:R, obviously) may be (and often are) a better approach for them.
The discussion about "uncertainty" and "probability" is not only a slightly semantic one (and therefore particularly prone to misunderstandings and to talking at cross purposes) but also to some extent what a logician would call a "category error". I'm "just saying" ...