How you can be sure that trading is different than gambling

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trading itself is highly luck based, you can't predict current war that caused market to dump so hard, if you do you would've shorted it.You can try technical analysis but most of them are self fulfilling prophecy, at most they increase odd from 0.50 to 0.51. In literal sense both are the same speculation on probability.
Except trader just want to be recognized differently

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Maybe you took trading as gambling that's why you said it's based on luck. Trading is risky as well just as gambling but gambling is an activity of probability and not something you can rely on as your source of income but their are successful traders on the long run. If you are good in analyzing the crypto market, you can maintain a long term profitability.
There is no denying that there are many similarities between trading and gambling, and trading itself is also based on luck, but they are different . People who say trading is gambling are people who do not have a clear plan and use emotions to trade instead of applying knowledge and skills.
Trading is a strategic activity if done with knowledge, skill, discipline and risk management . Trading can be considered a job but since it is unstable most should consider it as a side job and it only becomes gambling if it is done based on emotions, luck.