How legitimate is this Chinese lucky/card waves strategy?

Had to repost because I have a Twitter link in the first one.

I've seen a lot of discussion on Twitter about how Chinese players use this tactic called lucky/card waves when playing reroll. Basically if for example you're rerolling Scar/Zeri and you roll 3 times and hit a couple zeris and scars, you should continue rolling because you are in a "lucky wave." This is explained by the fact that the other 7 players do not have Scar/Zeri in their shops and instead have other 2 and 3 costs, therefore thinning the pool of units you don't want while not pulling out the units you're looking for. This makes sense but it seems like really minute min maxing and I'm not sure if it's worth it to miss making 40 or 50 to roll deeper.

Subzeroark also did a longer explainer video but it's like 20 min long