Well, if you think that buying at a dip is trading, then I suggest you get involved properly in trading for a while and come back to investment after, so that you can be able to differentiate between trading and investment by buying Bitcoin during the dip or making use of DCA strategies.
Well I don't know the quite you're replying too but let me recap my statement for better understanding...
Buying the dip is not related to trading at all because there could be other dip in markets under trading and normally a trader is meant to sell to make profit when there're dip in markets...
However, coming to the world of BTC buying the DIP is a good strategy for buying more BTC with lesser funds although this same strategy could be used by traders too since btc has always been in an uptrend buying a dip with strong capital could be a choice but most trader wouldn't want to risk that...
What I'm I trying to prove

Buying the dip would always be a good strategy with regards to bitcoin, but it better works as a backup strategy since it only involves buying at one market trend, since we have already said that using DCA is better since it involves ongoing consistent buying of bitcoin weekly or monthly or which ever way that the user chooses to, i think the misunderstanding here is with the usage of the buying on the dip, preferably like I said before, buying the dip is good cause it can help to accumulate bitcoin at lower prices but one of its flaws when used independently is you would always have to wait for dips and at times we could end up having indecision with regards to when is the dip or how to identify the dip and this could lead to underaccumulating of bitcoin making it a good strategy as a backup, buying on dip isn't trading unless a person decides to use it for short term accumulation to get profits of market waves.
For me I see buying only when the market is DIP as trading. This statement is wrong IMO .... but the strategy is not a suitable strategy for beginners when we emphasize on the word
.
Your right buying on dips isn't the best strategy for beginners considering that fact that it doesn't support ongoing and consistent buying of bitcoin which i think I'd what most beginners should be most bothered about since they are just starting out, but that doesn't mean they also can't practice it, yeah it's could be quite difficult for someone who doesn't know much to identify a dip and most newbies could tend to want to be smart and end up waiting to long or trying to caught the lowest point of the price and might missout on the whole thing, but yeah if the strategy is understood I think anyone can use it especially as a backup strategy to accumulate more bitcoin in times of low prices.