Tank expectation vs reality

Expectation:

1. Have high armor,magic resist and HP stats
2. Have plenty of cc
3. Have a lot of defensive power not deal damage
4. Should have HP,mr, armor scaling abilities

Reality:

1. They have high armor,magic resist and HP stats
2. They have plenty of cc
3. Did you say damage? Hold my beer
4. They have AP/AD ratios like carries