You're an employer with one open position and two candidates. One candidate has more practical experience (aptitude).The other has more moral character (attitude). Which is easier to remediate - capability or character? Which candidate do you choose and why?
"Moral Character" is a bit of a weird way to put it. A more common metric would be "soft skills", which are defined as "personality traits, social graces, communication, language, personal habits, friendliness, and optimism". Essentially their interpersonal skills.
The extent to which each are weighted when it comes to a job search really depends on the job.
The one thing to consider is that it is way easier to train someone in hard skills than soft skills. You can send someone to a class to strengthen skills like accounting, marketing, programming, etc, but you can't really send someone to a class to be a nicer or more sociable person.