It is perfectly said and I totally agree with the writer of this article that investment is key if we are to have financial stability because with the rate of inflation on the prices of goods and services money is fast becoming valueless so while you are quitely saving that your money it value on the prices of goods is reducing but if you invest it into one small business no matter how small the business is there will always be return on investment.
In that way your money is growing rather than reducing
Are you forgetting the fact that investments can fail as well? What if you started a business and it failed and couldn't earn you any money at all? All your money is gone just like that, and since you didn't have any savings and have used all the money on the investment, you are now left with nothing.
This is why, I never recommend prioritizing investment over savings, if one thinks they can afford it, they should do both simultaneously, they should have one wallet or account for savings and another for investment and they shouldn't use their savings for investment purposes so that if they make an investment in the future and it doesn't work out, they would at least have some savings to give them some back up.