Ahab wrote:

ok.. so your argument for not having manned missions is because of the
bacteria that we may carry to another world, which may or may not have any
real effect on that planet.

The fact that we don't know what information may be most important to
us in the future about other planets behooves us to be humble about
out immediate goals.

Probes carry bacteria too, based on your reasoning, we shouldn't be doing
those either.

I am suggesting that we should be cautious and thoughtful rather than
just do something as soon as we can. Taking care to eliminate
contamination from robotic missions is just many orders of magnitude
simpler than doing the same thing for manned missions. Besides, I
would like to see development of robotic technology more than the
development of technology for keeping people in cans for long periods.

--
John Popelish