It’s a brave man who can predict the how the abilities of two very young players will develop.
Of course there may well be less expensive options , but do they possess all the potential or perform well in the same areas as this young man ?
Are they available, would they be interested in moving to us.
Do they have the potential to develop into a player that will make a enough profit to reward the risk?
There are many variables that dictate the value a club is willing to pay .
Clearly he has been identified as a player who will meet most of the requirements.
I don’t know of any other player who matches Dibling in age , potential or ability at this moment in time ( doesn’t mean such a player doesn’t exist ) and significantly the only comparable one you referenced wouldn’t have chosen us even if we had approached him ( in my opinion)