If you expect any regulation, be it speed limits or anti-trust legislation, to have an effect on the situation the penalties for violating them must
reflect that, i.e. there needs to be a real reason for the business/individual to obey them. Financial penalties are the most direct way to do so.
Where speed limits are often arbitrary and I think rather useless to maintain safety, to say that also applies to anti-trust and monopoly regulations is a stretch. People tend to forget that the first of these sorts of laws grew up next to companies like Standard Oil and US Steel, companies so large they literally held a stranglehold not just on the people who did business with them, but even to a great extent on their competition. Who's to say Google isn't a monopoly? Not so very long ago with a few keystrokes Google changed the fortunes of hundreds if not thousands of media companies by cracking down on linking and changing how their algorithm worked. Whether or not you agree with their decision (I do, but that's besides the point) is irrelevant; the fact is that Google has the power to greatly influence the flow of traffic on the web, and this power is completely, 100% unchecked and rife with opportunities for abuse.
And as for your co-opting my speeding metaphor, it's also worth noting that while speeding itself isn't so awfully unsafe, plenty of other things that will cost you "points on a license" are also things like drunk driving, reckless driving, driving without insurance, driving vehicles that have damaged components, etc. in other words: things that not only affect your safety, but the safety of those around you.