My concern isn't about Beale as a coach (I'm sure he is 'special'), my concern is about him as a manager. They are two totally separate jobs. Coaches don't have to concern themselves with team selection and making intelligent in-game decisions (often under pressure in front of large crowds), how to pick players up who are beginning to doubt the team after a poor run of form, or deal with a player who is upset after losing his place in the team. They don't have to deal with the board, or handle media duties (which can be highly scrutinous in the Premier League). In other words, coaches are not the "front man" of the band. Beale as far as I can tell has less than three months' career experience of any of these things.
Of the two examples you cited, Klopp and Pep. While it's true they had no prior managerial experience, they were legends of their respective clubs, Mainz and Barca (Klopp 325 appearances over 11 years, Pep 324 for all Barca sides over 13 years). They studied the game, learned from the various coaches over the years, and were part of their clubs' DNA. That's not true of Beale - he bombed out early as a player and has been a coaching nomad.