Intentional Foul on Try

[SoFL_Rookie]

A1 drives the lane, takes off for a try. B1 commits an intentional foul on A1. The try is successful.

I realize that this situation is covered in the NF Illustrated Rules, 10-6 Pen 4. Count the basket, award two free throws and ball to team A.

A veteran official whom I respect told me that he would not call it this way. His point was that this play could result in a 6 point play for team A, and that he didn't want to see the game decided on it. Call a personal foul, count basket, award one free throw.

Help a rookie out, what's the "right" call? Stick to the book or consider the effect to the game? I realize this poses a much bigger question, and I am very interested in experienced opinions here.

Matt
(first HS game next Monday night)