Totally in agreement with you. Anyone with the ambition to set high goals with no values in place to control how they meet those goals are dangerous. Most may not be dangerous to the world as a whole, but they are dangerous to the personal worlds of the people around them.
These people are the main problem in our political sectors, since that lack values, they can go through anything to assume office. After assuming office, they embezzle the public funds with no conscience.
Indeed, they are dangerous as you've nailed it.