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I sometimes feel that everyone who hears something about cryptocurrencies will search for the next thing that he or she believes will explode 10000x. It is the feeling that they missed the train and now find themselves hunting that one coin nobody else knows about. In other words, probably 90% of new investors decide against going down the solid route and DCA into Bitcoin overtime right from the start.
The worst is when you get into hopping from Bitcoin into shit coins and try to do that repeatedly, hoping to double your money. In the very, very beginning I have given some shit coins a shot and while it is exciting to see some of them go up, the markets for them very quickly dry out or some of the "dev wallets" get flash dumped and you are screwed.
Yes, I quite understand it, and of course you have explained it well.
There are several common reasons why some new investors own altcoin compared to bitcoin, one of which is that the price of bitcoin is very expensive compared to altcoin price.
They seem eager to buy a lot (meme or otherwise) that they find profitable, but at the same time they fail to understand that bitcoin can also give them returns if they know how to manage their investment budget. As mentioned, DCA will help them earn more bitcoin over time, but their big ambition for altcoin profit mean some of them don't want bitcoin in their portfolio.
The proof lies in the data for Bitcoin. There are threads that explain in a very solid way where somebody would be if they had investors X amount over time in a certain interval. It is mind-blowing and only in hindsight do more people understand how powerful DCAing would have actually been for them even with small amounts.
Of course DCA is good and would be better if used consistently for accumulation.