No doubt learning and improving is usual thing in every life no strategy is bad DCA, lumps sum the most important is to buy and hold for long time , I can remember despite how many person may say about the DCA one of my friend who invest in Bitcoin told me because of his engagement with other things he prefers lump sum that he don't always have time to buy in parts because it seem as a way of monitoring his investment since his motive is to buy and accumulate for Long he buys and remove his feeling just one till he plan buying again to add up, I see that what he feels and the knowledge he conceive towards usage of the strategies become his guilds DCA is good for all mananer of investor but some still tide it to choice as it depends on knowledge and what the investor may prefer at the moment he wants to buy correlating this your statement is hundred percent correct.