DCA strategy be damned, now is the time to fill your bags. Anyone left straggling
behind after the ETF approval news comes out has only themselves to blame.

What if someone had been DCAing to the max for the past 4-6 years, and such person might not really have any extra cash to throw towards bitcoin, and probably such person is already doing pretty good, even if some of their coins were bought in 2021 and early 2022 at higher prices than current prices.
Like you had said, "such a person is doing pretty good", to have been DCAing for that number of years without fail. If I was in that position I won't get worked up buy relax and be doing maintainance on my Investment waiting for the ATH.
Or? maybe you are referring to the fence sitter who failed/refused to buy BTC in the last year and a half or so while prices were mostly lower than the current price and perhaps the last year and a half had prices lower than where we might be going. Perhaps? perhaps?
This group of persons are the ones that are to have themselves to be blamed when the ETF had finally been approved and bitcoin price surge as a result. For this group there's nothing in the chart for them and just like those that had regrets back in 2021 when the last ATH took place the regrets of those now will be double with the eventual approval of the ETF by or before 2024.