I wouldn't call not buying a van cheap or lazy. I wouldn't bust out tens of thousands of dollars to buy a vehicle that's butt-ugly to tow my $1,000 boat.
Wouldn't say not having a catbox is lazy, maybe cheap.
We bought a catamaran because we wanted something cheap, simple, and light. We also wanted something we could tow with our Ford Escorts.
A sail tube and a Tuff Box were a great addition, and have made it practical to sit in the Escort while we are towing our cheap and light boat. But yes, some people bought a catamaran because it is a simple boat that doesn't require a van or an expensive cat box.
I may be cheap and lazy, but our cars are paid off, and we don't need another one.
Jonathan
