The Crimson Binome
Hero
Dex is useful, but not significantly moreso than Wisdom is. Missing either save will ruin your day, and getting surprised can also be pretty bad, but this isn't the sort of thing that will make or break a character the way that bad AC will. A low-Dex melee fighter can survive just fine.I disagree with both those statements. Dex still affects initiative order, saving throws, etc, and front line types do need higher Con as they're more likely to take damage and thus need HP.
You're also underestimating how important a good Con score is to spellcasters. Sure, they won't be targeted as often as the front line, but they also don't have the AC to avoid many of those attacks, so they end up taking more damage when they are attacked. They also need to be able to make concentration checks whenever they take damage, which melee types generally don't need to worry about.