It's not as easy as you think... You don't sub off Messi just like that. He wants to play every game from first to last minute and subbing him off only makes things worse. Even Pep couldn't manage to make him sub off. Says a lot.
You are probably right, but do you know what, I have seen A LOT more mature Messi this season, so I wouldn't be to sure. Others in the past wanted to sub Messi without his hat trick, which was -and is wrong. Very wrong. Players like him are entitled to compete for everything, including records if he so desires. Messi needs his goals and what better way to give them to him by playing him against Huesca and Elche? Sure, there is not much glory in such goals, but in the end his tally will be up and his season will look better as a result.
Btw, Messi have been spared 3 times this season. 2 times against Huesca and 1 time against Elche. Do you know what the goal difference is in those 3 games?
16-1! Now, if Messi had been playing, how many of these 16 goals do you reckon Messi would have scored?