The same mistake in the financial crisis is hardly made twice

I read an interesting article from Financial Times called "Too much 'medicine' could make the finance system sicker". It was about the Japanese economy, but I think such phenomenon could happen to any economy. The article suggests two reasons that cause this phenomenon. Firstly, after several crises, individual players play safe. It is a rational move for individuals, but the financial sector will grow slowly as a whole. Secondly, after the global crisis, regulators have tried hard to make the financial system safer and enhance financial stability. The new rules limit the growth of the financial sector when the world has been aware of the importance of sustainable growth and development.

I think such kind of mistakes could only happen once, as the whole financial sector suffers from the mistake and will avoid to let it happen again, with or without the intervention of regulators. Latent mistakes are more deadly.