As the final weeks of the championship approach, 3 points of difference can make the difference in winning a title. Barcelona still has the advantage but Real Madrid does not give up. Atletico Madrid does not give up and waits for the result of Real and Barca.
Let's say we are in a situation where there is a lot of uncertainty and therefore this keeps the fans glued to their seats to see how it will end.
Let alone a difference of three points, but a difference of one point or even a difference in the number of goals with the same level of points can also be the deciding factor for a team to become champions at the end of this season. But for now the three teams you mentioned still have to fight very hard, especially for Atletico Madrid and also Real Madrid because Barcelona is already slightly ahead in terms of the number of goals and could be even better in terms of the number of points if Barcelona is able to win when hosting Osasuna next weekend.