it was partially a joke. But yes, dollar cost averaging across a recession will make the total portfolio look ok. I do wonder if we can always continue to make higher and higher "highs" in the market though, meaning any investments I make at the top will make $0 gain.

I do agree with you overall about indexing, however "Just wait until the recession is over" is market timing and I dont believe I (or others) can do this dependably well.