You were supposed to see Goku start off from the loser dweeb and eventually become savior of the galaxy.
Except that this was never Dragonball's story. He was an illiterate country bumpkin with a simple, honest, almost childish view of life that NEVER changes, even in the final chapter.
He's not Peter Parker, high school nerd who becomes a superhero. Dragonball Z maintains his simple, carefree attitude as he still lives in a remote farm while Chi-Chi.
So no, adapting Dragonball was not the smart decision at all. Fans wanted Vegeta and Super Saiyins, not Yamcha and Demon King Piccolo.
My example is perfectly right. If they made an FF film, they'd be INSANE to choose the early material of FF1 versus what the fans want, Cloud and Sephiroth and big acrobatic swordfights.
You can like the film all you want, that's your prerogative, but you cannot pretend Dragonball was not what the fans wanted, they wanted Dragonball Z fights, and that's why it failed miserably.