Yes, that's why, Atletico Madrid who are 7 points behind, Real Madrid who are usually the favorites to win La Liga now seem very difficult to win La Liga because of their failure against Valencia which resulted in the points gap with Barcelona getting further away, which is now 4 points. So, for this season, the possibility of Barcelona becoming La Liga champions can be confirmed more than 60%, unless in the remaining matches, Barcelona experiences failure and error that continues for 3 matches. But it seems that will not happen.]
Right now I don't see Barcelona missing the title unless they failed badly in the last 4 games because I don't see them losing the first four and El Classico will determine which team will lift the title unless Real Madrid continued trolling and losing points randomly.
There is enough games for every manager to guide his team correctly. Real Madrid has like two serious games among the remaining but I cannot say anything after what I saw from them. They should prepare well for everything and hope Barcelona miss points before them. Otherwise I agree with the percentage you mentioned for Barcelona.