Investing is not gambling. I mean, sure, nothing is 100%, otherwise we would all put all of our money on that one stock we are sure is safe
So it's not "pure gambling" but there can be something of a luck in it
Alibaba for example is a super strong company and yet it's now 30% down from it's peak because CPP decided to investigate it for monopoly
Was it something that people expected a year ago? probably not
And this sort of thing can happen to any company even in the US. Facebook for example -
https://www.nytimes.com/2020/12/09/technology/facebook-antitrust-monopoly.html
Somehow it didn't affect the stock price, but it can
Other unforseen stuff can also happen like how the COVID pandemic affected travel and entertainement stocks
Hertz sucked a lot before the pandemic but it wasn't at a risk of bankrupt as far as I know..and look what happened
If investment doesn't have a little bit of a gambling in it, why won't I just put all my money into Apple stocks?