This is actually not hard to understand at all.
Many web people got their start freelancing. You may know some. It is not uncommon to incorporate when doing that. The idea is if you fuck up their site somehow (or more likely - they claim you did) they can't try and go after your personal bank account or your car or your house. Only what is held by your company. You also get other benefits, like tax breaks for being such an industrious member of society.
The same incentives are being set up on both sides. Because generally it is good for society when people start companies. A company as a liability shield is only a bad thing if you think personal assets should be at risk because someone is unhappy about what you did at work. If someone wants to sue you over something that happened as part of business deal, why should they be able to threaten the house your family lives in?
Seems sensible to me. While there may be problems as the scale of the company (and remuneration of its officers) increases, the underlying principle isn't exactly hard to understand. If you shot up a public area and then tried to claim that was a business activity, you would obviously not have an argument. It isn't plausible on its face. So I'm really not sure what point you're making.
If it's just complaining that it is hard to prove things in court when massive companies are involved, then tough. It is also relatively hard to convict people who shoot off guns in public even if a whole bunch of people saw them. In simpler times a mob would have simply formed and executed them. We don't get to do that anymore, because we don't want to live under mob rule.
That's what rule of law demands.