I don't recall ever seeing laughter as a requirement in a job description. There are industry skills needed, experience, drive, responsibility, and other traits that are priority when scouting candidates. And while laughter may not be profitable in most industries, it is a huge benefit to the team environment.
A shared, honest laugh immediately lowers any walls or barriers. There's something about an uncontrollable reaction that humanizes and places everyone on an even playing field. A laugh also unites us with a shared experience we can remember over time.
Does that mean a stand-up comedian is required at every company meeting? No. But it is important to create an atmosphere and opportunities for communal laughter. Joy is also contagious, so as people grow more comfortable and lower their guards, a background of joy and belonging can spread throughout the company.