How exactly? Gla1ve got an already established team, and got them to finally win a major (which probably would've happened with karrigan too, if the team wasn't revolting against him), and astralis only really turned up, when magisk joined. Plus, you can't know for sure how good they would be without zonic.
Karrigan meanwhile made 2 teams that were struggling into big tournament winners, both in a few months, and with pieces that never really played together before. He's the perfect candidate for this job, and you can have a coach too.