Without skills and knowledge - trading is definitely called gambling.
Traders don't rely solely on price volatility, even though it's what can generate profits. Analysis is necessary and they need to study several indicators to determine the best time to buy. Traders who are called gamblers rely solely on luck - meaning no analysis, just buying randomly and waiting for the results. So I have to agree that traders and gamblers are fundamentally different.
If such traders get into the phase of active growth, then their luck can be long-lasting, but after the trend changes, it can turn into a streak of bad luck for them and they will be lucky if they can save at least some of their profit. An experienced trader knows how to identify trends and act according to the market, for those who do not understand this, it will be fortune-telling on coffee grounds and in the long term, of course, losses will prevail over profits.