We need to separate the idea of investment and gambling. Yes when you invest into bitcoin you "take a gamble" on the price, but that's still investment, and yes luck is important there as well and I get it. However, we need to realize a lot quicker to learn how gambling could be something else.
Investment back in the day into stuff like being a Sheppard or whatever and getting a bunch of sheep wasn't gambling, it's investment. But for example, dice gambling existed over 2 thousand years now and that's the difference. Look for the things that are gambling and betting which are a bit different and you will see the history of it. Plus the NFT and Play2Earn is in the investment category as well, it's not gambling.
that is the valid point you have mentioned and very valid example you have mentioned as investment coming back like a flock of sheep - but what if it is lost or attacked then obviously it is gone for evere. . I am also not sure why people called it investment.