I hate to disagree with this because I sympathize strongly with the underlying sentiment, but I have to disagree anyway in this case. If you had just said that business owners who don't have an online presence could benefit from having one, I would certainly agree. But if, for whatever reason, a business owner does not have an online presence, that does not give online entities like Google an excuse to publish false factual information about them. The operating hours of a business are factual information, and if Google is going to let such information appear on its site, it has a responsibility to verify its accuracy with the actual business owner.
I know the internet is much more popular since the last 10 years, but I don't think everyone is really up to it. There are still big opportunities to scam people who don't have the minimum of tech savyness: viruses, etc.
The internet is still a jungle with not enough laws.
Why not just have better defenses against things like this in the first place, that work whether the activity is deemed "wrong" or not?
I'm not saying you really need laws, but regulations might improve the situation. There's nothing really illegal there, but it would be nice to see google being liable for its data if it reach a certain size of audience. In this case it's false advertising of defamation (unintentional).
Google map is a product, even if it hides behind a free thing "use with caution". Most people can get along with it, but if it starts to have a big impact on society, people will indeed become wary and learn, but not everyone will do.
I guess you can say "let the nature do its work", but that's not always how government see things, and that's not why the government exists. Strong government can do big improvements, I think. It depends, that's a balance to find.
I think it's likely that he had little interest in the online presence of his business, but he must also have missed opportunities to better manage it (I'm thinking of information from a chamber of commerce or similar, or just conversations with people).