I have to agree because one team batting first or second does not decide the winners and the losers of that match. And any team is going to take the advantage of the toss that's why toss is a thing in cricket.
And I think as the tournament progresses the matches are going to be more competitive and close. I am hoping to see some really close matches especially when the big names face each other.
Toss is key element in some areas like we see in recent T20 WC at UAE that team who won the toss and bat second wins the match. I don't know how significant is TOSS in U19 WC games. Teams like PNG are not up to the mark of U19 WC but still its good that more countries are joining in and gain some experience.