That makes sense, but on mars? Full payload, very little atmospheric drag, little atmosphere to keep the blastolith from scrubbing the bottom of the vehicle. I am talking generically since presumably the first stage won't be landing on mars.
Mars is far off enough it's entirely speculative on how they'll handle this. Drop some robot bulldozers first? Specialized landers for landing pad construction crews? Bring the heavy cargo via a separate non-atmospheric craft built in Earth orbit? Hover from height for a while to blow debris off a rocky flat spot?
I don't have the answer, but IMO cheap mass to Earth orbit is the biggie that enables a whole bunch of options.
There was an idea of adding aluminum powder to exhaust and hovering a little over the pad, so that you deposit a solid metal surface where you intend to land.
