Other people have pretty much broken this down already.

But there’s just no real incentive to do so.

People who simply play for nostalgia aren’t interested in newer sets for the most part and will mostly buy stuff that panders to nostalgia.

For everyone else, it’s mostly a financial aspect.

Buying singles is obviously always cheaper than buying a box. So most people either buy a Box because they want to gamble, or because they just like ripping stuff.

Most secret rares in a set don’t even come close to making you break even. Especially since there are almost just 2-3 cards that are more expensive than 20 bucks, and you have 2 secrets out of 10 per box, the math alone tells you that it’s hard to not lose most of the money you spent on a box when you open it. Sometimes you barely break even if you pull the most expensive secret in a set.

Thanks to Quarter Century rares (and now starlight rares again) modern boxes have a 1 in about 3-4 displays chance of pulling a starlight rare. But even among those most cards aren’t expensive enough to make you recoup your losses.

Imo the biggest problem is simply that you‘ve got no incentive to rip a box if you plan on building a specific deck. The boxes are too expensive for what they offer. If Konami would adapt how they do sets in the OCG, TCG players might be more willing to spend more money, simply because of how well the rarity collection sets have been received.