well, the thing is...a lot of these YIELDMAX ETFs are based primarily on income goals. So, they might give up some NAV for income, it's the trade off. There are studies that show if you simply invested is MSTR you'd outweigh, in the longer term, the total return.
But as you get older, if you want the stability of an income over the ups and downs of the market some of these might fit the bill.
I'm retired and just wanted to experiment with some "mad money" in what I refer to as my income account. So I created my own "ETF" made up of three parts - preferred stocks, dividend ETFs and individual municipal bonds. Obviously the municipal bonds and the preferreds form the conservative part. But then I added about 20 of the more aggressive covered call ETFs, some closed end funds, some BDCs. Over the past couple of years I'm averaging just about a 12% return with, in my opinion, reasonable risk. I'm down some in NAV (minimally, and they go up and down just like to overall market) but I generate a few $thousand a month in income, some tax free, some qualified and some just totally taxable.
To be honest, I have the rest of my money in real estate or with a wealth advisor. So I can afford to experiment a little with money that will only be spent by grandchildren. I just like to remind them how much money they gained or lost each year. I'm still trying to figure out how to take it with me.