I tend to disagree with this

I don't deny that capitalism is better than socialism overall provided all other things are kept equal, but this is not the case in real life for the most part. More specifically, if we are to remain honest, only a small fraction out of 2 million people in any country may actually start and successfully run a business even if they allegedly have (or do not have) the freedom to do so. First of all, not all humans have the propensity to run their own business at all (in fact, only a tiny fraction can). Further, in today's capitalistic system it is next to impossible to start a business given that all profitable markets have already been seized and divided by those mega-corporations. Your only chance is to be the first to enter some new field when it hadn't yet been conquered by corporate monsters and become that monster yourself before the rest of the pack. Otherwise, you will be quickly run over by competitors (but that's not bad in and of itself, of course)