One interesting I found about the DCA method is that it makes the investment easier and without both emotional and financial stress, so I don't agree with you that investing and HODLing Bitcoin is a tough task. If it is tough, it simply means that you are not investing the way you should, maybe you are investing with amount you cannot HODL since the money is for some other basic needs. The DCA method actually afford us the opportunity to Bitcoin in a way that it will be easy and without much stress on our finances. It makes the investing easy as one is leveraging on the power of compounding and gradual growth.
In conclusion, it's just about how someone who wants to start using the method, must have a steady income and be able to manage finances well. That way, no one will feel pressured to invest some of their money to buy bitcoin consistently. Because they can already set aside a little money to save in BTC without having to think about other needs that have been met.