It was just an example, and numbers or wording can always be tweaked to taste. I don't think a sword & board needs the same DPR as a 2-handed character, obviously, but a TWF character probably should (giving up range and raw damage for better reflexes and number of attacks). That is very hard to do with RAW right now, let alone create a playstyle that feels cohesive I think.So dex build with rapier and shield could do either duelist style to get basically the same DPR as that two-hander* with a better AC or take the protection style to help their buddies. At higher level, get both. Heck, take sentinel in there somewhere too. Meanwhile they still have far better ranged options (sans house rules) and all the other benefits.
Don't get me wrong, I personally prefer strength based builds, but there's little justification for it from a rules perspective.
*At least close enough that outside of a spreadsheet no one is going to notice. GWM will make your damage more volatile and in the long run may be slightly better, but I'm not convinced it makes much difference at the table.