You still don't get it. It's not about the size of the vehicle. It's about the COST. What good is a rocket that is too expensive to use?
It's like buying a Mack truck to move when all you can afford is a U-haul. You're left with a really great transport but no money to buy cargo.
Sure, logistically an HLV makes missions easier, but if the only way you can afford to do those missions is if you break it down into smaller parts and use some elbow grease, well, I'll take the smaller launchers.
No bucks, no Buck Rogers.