This strategy is very beneficial for newbies as well as experienced people, often even experienced people buy all their capital in crypto currency at once. Sometimes, when the price of Bitcoin falls significantly, people think that the price will not fall further from here, and in the lure of profit, they immediately invest all their capital in Bitcoin or any crypto currency.
It is not recommended newbi invest the entire all in fund and maybe this applies to old people as well. Because in trading there is management that you have to do as you wrote. DCA may be done by an old trader who has a good understanding of trading, while Newbi may learn to manage funds is a good start. Start with a small fund and learn how to manage your funds so that they grow and don't run out. Newbi doesn't have to think profitably, focus on learning. That's the best moment where you will be more successful in the next.