LeBron has the luxury of being 6'8 and ~250 lbs. If he wants to get a bucket, there's really no one on the planet that's gonna stop him. He has the physical tools to will his way to the rim.
D Rose doesn't have that luxury. He may be slightly quicker, but mozgov stays chillin around the rim because Noah doesn't do anything offensively and Gasol has been out the last 2 games. No matter how good D Rose is, he's not gonna get past Mozgov on a consistent basis without proper spacing.
Why is it "bad" to lean on a player like Gasol? This is the exact reason why Bull's brought him here, for the spacing and shit. So why is it all of the sudden a bad thing if the team needs their starting PF who led the league in double doubles?
He's a great player who provides spacing necessary for our backcourt to get easier buckets, which translates to better odds of winning.