Rovers and robots will be competive with humans or perhaps better.
Humans will be lucky to work 5 hours a day on actual mars exploration
5 or 6 days a week tops. Plus they will have to deal with fear and
being lonely. Family and friends so far away, the long term dangers of
radiation, let alone the possiblity of some key equiptement breaking
with no spares available.

The rover mission costs will be far less, with no human consumables
necessary. Food, water, oxygen and all the other supplies, plus spares
for a mars mission will be a killer.

Let robots lead the way