Marxists don't argue for a deonotological disallowing of markets, but believe that those who own the markets should not thereby own the rest of society. I'm sure even you would agree that it would be better is everyone had the comfortable position that you do -- and indeed we should move in that direction, even though we cannot simply decide that everyone will be wealthy tomorrow -- but we all must work with the conditions we find ourselves in, including to transform those conditions over time.