I disagree. You can absolutely be a powerful leader with a powerful vision without being mean or being, for lack of a better term, an asshole. That doesn't mean you acquiesce or agree with everything everyone else says, it just means you lead by example and with a keen understanding of how what you say and do affects those around you, rather than ignoring that.

It's similar to taking medication to treat the causes of an issue without being concerned with the side effects. It's totally cool if your headache goes away, but less cool if you then have seizures for 2 years. It's even worse if it makes those around you have seizures for 2 years, while your headache has gone away.