the argument is narrow: capitalism had great success.. majority of people want it. even Monarchism had great success: the art it produced and financed is still considered the best ever.

So your argument for communism, wont stand, when someone do similar arguments for capitalism... yes they can! and it will probably dwarf your list of good communist stuff.

you cant ignore the bad stuff, because some proven good result. That argument will backfire dramatically.

A better argument, is probably about how communist bad stuff are the result of a few people, why capitalist's one are result of the system itself. But i'm not in the business of comparing government system