I’ve got one of those cheapo Amazon red dots as shown in the meme. Got it from Amazon for like $20, and … It doesn’t actually suck.
Of course, I put it on a .22LR, not an AR15, I’m not an idiot. But I have probably put 500 rounds through it, and the sight works just fine, holds zero perfectly, has a 2MOA dot or an EOTech-style circle/dot, and a cross hair dot, all in red or green. Red’s not bright enough for use in full sun, but the green was fine.
I was shocked.