There's no excuse anymore as to what's there to find out about a game that'll determine whether or not it's worth it to pre-order. It all boils down to - FOMO. Nobody wants to be that person, who'll get the game a week after or even a day after. They want to be there Day 1. They want to be there as the first batch of people who've bought the game. They want to be the first to review it, to stream it, to have hands on .etc Whatever reason they prop up as an excuse to pre-order in the first place.
And I wouldn't restrict it to This Year, it should be an all around precaution of common sense. Games are steadily going into the $70 default price tag now and yet there's gullible people who'll still slap down just for bragging rights and FOMO.
I agree it should be an all around precaution. However, I was not born into a reality with common sense so its easy to see why this is happening from my perspective. So many kids just left to their own devices, or taught by ignorant people who were/are still doing their best.
Preordering it is common sense when you lack information.