Gold and Silver are better than bank deposits and not safer. It is better because gold and silver offers more interest or profit from your money when you put it to these kind of precious metals rather than depositing your money in bank because if you will do that then you will have almost no profit since they don't offer a high interest annually.
You are on self contradictory on your own post. "Gold and Silver are better than bank deposits and not safer." You told Gold and silver are better and on the latter of the sentence you told it is not safer. I think you are on the wrong way you you type it by mistake.
I think he meant to say that value of our money will be safer when we hold it as gold or silver but keeping gold and silver is not safe due to high chance of getting theft.
Eventually we need banks if we hold gold bars because we can't pay anywhere with gold,fiat money act as the medium of payment.