Had there been accurate reporting, disclosure, meeting of capital requirements, self-regulatory structure and organization, safeguards against market manipulation, and so on, perhaps this all could have been avoided.
It can also be avoided by competition. Companies that are incompetent will eventually be out-competed by others. The companies left standing are better than the ones that failed. The fact people are still using Mt Gox tells us that it wasn't that big of a concern. Stop thinking that you know what's best for other people and let them make their own choices, their own mistakes even.