From a logical point of view, yes, but in reality, it's not like that, and the decision needs to be changed.
Let's say there are three doors - 1, 2, and 3. A car is behind the first door.
If we initially chose the first door, then to win, we don't need to change our decision.
If we chose the second door, then we need to change our decision.
If we chose the third door, then we need to change our decision.

Therefore, in two cases, we need to change our decision, and in one case, we don't, so the chances of winning by changing the door are 2/3.