Every one individual or investor always have their business strategy. People approach business in different dimensions but the focus is all about making profit. It is also of importance that as you are waiting for profit, you should be able to take or face the risk involved because *no risk, no gain.
As a matter of fact, traders are likely to benefit more from their daily trading because the odds are likely in their favour when the market fluctuates. Good traders sees the opportunity in the market price fluctuations and possibly taking advantage of the situation in their own favour. Thus, this is what it means to be a trader.
I do not fully agree with this idea stating that day traders are likely to profit more from daily trading and have higher chances when there is a sudden fluctuation in the market. Of course, there are some traders who do make money in the short term but the awkward truth is that the majority of traders do lose money in the long term.
On the contrary, research has revealed that the majority of day traders end up making more losses than profit. It indicates that the markets are volatile and subject to change, even the least movements you can end up losing a lot of money.
Moreover, the concept of ‘no risk no gain’ as the general law of the trade omits numerous factors of trading. While it is true that taking risk is a vital factor in trading, let's not also forget that reckless risk taking is unfortunate and destructive. Also, the assumption that traders can have a head start every time the market fluctuates is quite unattainable. Many investors make the mistake of trying to time the market, a definite no-no.
However, in reality, trading is more than what you've explained and is a delicate combination of risk management and returns, technical and fundamental analysis, and concepts like patience and discipline rather than fast money.