If it doesn't make sense for you I can't help you.
But, for a starter, Vušković can't get a work visa until he's 18 years old, which is the main reason Spurs have loaned him out to "minor" leagues (and not their top teams).
Dorrington had trained with Spurs 1st team since October 2023, and was on the bench several times...until an hamstring injury kept him out for around 8 week, and then he got another injury that kept him out for 3-4 weeks and then he had an hamstring operation in May.
It's hard to play for any team when out injured half of the season.
However, if you - and those who agree with you - think an 18 years old Vušković is ready to 1st team footy without having been tested in England at all, feel free to believe so.