Of course it is true as you said, Carlo Anceloti will not want to take a big risk in fielding his best players just because he is pursuing the ambition of winning because in fact Real Madrid has been declared victorious in La Liga and has already won the trophy so why is Real Madrid trying to win every game when they have was declared the winner and Carlo Anceloti also wouldn't have done that and taken a bigger risk because Real Madrid still had another important match competing in the Champions League final. If Anceloti fielded his best players in the La Liga match he would be afraid of injury because we don't know it's bad luck when it will happen so it's better to prevent it from happening.
Moreover, using Real Madrid's second player also continued to perform well in La Liga, it was proven that these players' attacks looked aggressive and created many opportunities at home to Villareal. Although in the end the Villareal players also counter-attacked which resulted in only achieving a draw, but even so, Real Madrid also quite satisfied with the draw, rather than having to suffer a defeat, at least one point can add to his points collection this season.
Real Madrid boys have always had a good game for the team even though more than much is been expected from them but for a game in a every competition, they always did really good. This only resonates the sermons of how well built up Real Madrid squad is. The young players are definitely an extra advantage to the team's strength.
Ancelloti has been able to bring up his boys into more fury and it's exactly what they need to stay strong. There's good coordination and the zeal is always up for them. It's very much good that the team has been able to stay strong up until now and they seem undaunted too. It'll be more beautiful to watch these present Madrid perform at their peak even up till next season, the players are gaining good level of experience and it's working out good on them.
I believe there's still a whole lot more to expect from the Spanish side next season. It just seems to me like they've got a balanced squad that's fit to bring down any team that may try to feel like giants. The retainment and addition to their squad list ahead of the coming season speaks a whole lot of danger zone ahead. Ancelloti is really moulding up a fearless and dreadful team and it's amazing how he's so much confident in the ability of his boys to deliver no matter the goal line.