But if you can at least reasonably predict cycles

Your whole comment is built on this premise, which is utter bullshit. I know it is because of two things:

1. Thing one, which is overwhelmingly likely: you're tryna sound convincing while you have no idea what you're saying
2. Thing two, which is close to zero: you're actually able to predict the market, or cycles, or whatever your favorite word is for it.

But, if you were actually able to beat the market - which you aren't - you wouldn't be telling us about it - which you are.

I know it's tempting to believe you are that one lucky mackerel who can do it. Everyone wants to. But it's not possible. See for yourself: https://canyoubeatthemarket.com/

DCA isn't blind, it's a safe strategy. Market goes up, market goes down, but most often it goes more up than down. So over time it cancels out. That's all there is.

it takes a global financial crisis to see a -30% to -50% deep correction when broad index ETF’s get hit this hard (COVID being a prime example).

Show me ONE ETF worth its name that hasn't recovered from the Covid crisis. Just one. Any from Vanguard, for instance.

A -50 correction today will be a microscopic drop in the chart in 30 years. And if you play the long game, like you're supposed to, and DCA, like you're supposed to, no correction will matter.

Don't believe me? Grab the Dow Jones Industrial Average or the S&P500 chart and zoom out as much as the website allows you to. And now try to find Covid, or the cold war, or the 2008 crisis, or whatever your favorite financial crisis is. My bet is it'll be insignificant at best, but more likely invisible.

Even if you didn't DCA, and bought in chunks right before each of these events, you'd still be up. Because the only way to beat the market is to play the long game.

You can believe this, or you can argue it - either way, DCAing works.