Heros heal option !!

The heroes are immortal and must be healed before a battle is ok .But is it necessary for heroes to heal forcefully even for some small hits or small decrease in health ? .

I think supercell must give us the option to heal hero by putting him to sleep if he has some decrease in health to fully regain his health or leave him as such with his hits . After all they are our heroes right ? So they should be in our control i think .

Heroes must be forcefully put to sleep ONLY if they have zero health .

Please forgive me if this thread was started somewhere else and please give me your precious suggestions fellow players .And sorry for any mistakes .

THANK YOU !!!