Use a muscle car instead of an off-road vehicle when your necessary journeys fit the car's supported road use and you place greater value on its particular performance character than on specialized terrain access. A paved commute and road-based weekend trips can make power delivery, seating position, styling, and chassis response central to the choice. Clearance and low-speed terrain equipment have less practical value when those journeys do not require them.
That does not make every muscle car a better road car or every off-road vehicle a poor daily driver. Comfort, space, drivetrain, tires, and ownership costs vary substantially. The decision is strongest when the exact muscle car passes your everyday requirements and the off-road capability you would give up has no necessary role in your travel.