No, there are certain industries which seem to perform better when the government enters as a competitor. e.g. healthcare, postal services, police forces, military, media, communication networks... many things which we often take for granted.

As outlined by others, market liquidity is beneficial to everyone, not just bankers, but market-making driven solely by profit leads to trouble (as evidenced by recent events). This parallels other nationalized industries (such as healthcare and police forces), and I expect that the benefits other pseudo-nationalized industries have seen would extend to market-making as well.

Most of that is infrastructure, not industry.