It's just like FOSS philosophy: Everyone can fork it. For example: SSLeay, OpenSSL and LibreSSL. Or SSL 3.0 and TLS 1.0.

The one with most people use will win, why we need to afraid of diversity?

Because they dont involve money but bitcoin does.

Almost the entire payment infrastructure of the internet relies on one of the libraries / standards mentioned in the post above, so it would be a stretch to say they don't involve money.

I understand but they are not directly involved in the process. They provide value to other systems rather than carrying the value themselves.

That's a terrible comparison, my money doesn't get locked into a specific SSL library when I use one for the first time.

The good thing about these Bitcoin forks is that you don't really have to do anything if you don't want to. You can just forget about it and hold. You will own the same amount of Bitcoin for every fork out there.

Not in this particular hard fork. If you spend coins on the other fork, it can get replayed on the original bitcoin chain and you may lose your coins. Read my article about replay protection linked in the article.

You still own coins on both forks, but add a step to split them to another address you control on the second fork.

Unless the whole things implodes. Then I would have liked to convert something to fiat before it's all over.

Yeah but it is better as everyone will have a clear direction after it