Of course saving is not enough at all, that is one thing most people normally forget. However, saving can only be a enough when you have a good investment plan for yourself, without that there is no how your savings would be able to cover all your needs. Normally having a savings is quite good but let it be that you have an investment that would be fetching you money all the time because saving alone might not be that fast in times of achieving goals.
I think so too, but the bottom line is that we need to save for everything we do, including investing, which of course requires saving first.
It all depends on the plan we make at the outset. If we want to grow, we need to invest or start a business. Saving won't increase our money. However, I want to reiterate that this doesn't mean saving isn't important.