@Ruin:
The idea here is that when a Saiyan who has already gone Super Saiyan has a child, that child has more S-Cells, reducing the threshold needed to become a super Saiyan.
This makes sense.
Goku, Vegeta, and Gohan all have fewer S-Cells than their kids, meaning they required more strenuous circumstances to achieve the super Saiyan transformation.
This part also makes sense.
Being raised in peaceful times also makes stimulating these S-Cells easier.
But this segment doesn't make sense.
Wouldn't it make more sense if Gohan and Trunks awakened Super Saiyan 1 through anger, but simply needed to go through less traumatic experiences and didn't have to be as old/experienced? Like, what if Goten was really upset that he couldn't get ice cream for dinner and awakened Super Saiyan 1 during his tantrum? I would think that's a lot more consistent because it would be a less stressful moment than seeing your best friend/mentor/pride die in front of you, but still be consistent in having emotional stress be a trigger like all of the past Saiyans pre-Buu saga. Being raised during peaceful times shouldn't be a catalyst. It should either have no influence or even obstructive if anything because that is the exact opposite emotional trigger that we've seen for these transformations.
This is like saying if I awakened super strength by lifting weights and drinking gatorade a lot every day due to a special gene, then my child who inherits en even more potent version of this special gene should have an easier time gaining super strength by lounging around on a couch eating junk food while watching Hallmark Christmas movies. That doesn't work. They should have easier access to my strength by still exercising, just to a lesser degree because of a natural genetic advantage.
Damnit, this series doesn't deserve having rational thoughts inserted into it lol.