OK, so, firstly in regards to the thread title, it's all about fractional differences, big base numbers mean big differences are required, if you can't understand something as basic as that, you are screwed. Higher or lower base numbers makes no odds, its just a ratio. It was done this way for a reason, which I will come back to later.

All damage mechanics within the uncapped stat region seem pretty linear but with varying gradients, it can however be said that if you increase (all of) your damage stats by 50% it averages out to an increase your damage by roughly 50%. The notable exception here is m.acc (and possibly acc) which seem to work on some non linear function of m.acc-m.evais judging by the very steep change in resist rate between 425 and 450 m.acc on Ifrit.

The problem here as usual is balance, plenty of people complain about their gear not making no difference because they don't understand the system, meanwhile I am running around 1 shotting Sprindiggles on my THM. If you guys get a boost by increasing the base stats on gear, how broken does a decently geared THM become? (None of this is THM specific, but it's my main, what I have done most of my testing on, and the only DD where stats aren't dominated by weapon base damage, so it's pretty much my ideal case study for everything xiv)

Now, the reason why base stats are in the hundreds and not the tens? It is because of solo-ability, SE made this game so people could reliably hold their own solo, especially on mobs lower than them (compare with 11 where fighting a lv50 mob was almost the same as fighting a level75 one solo for most jobs). This requires the base stats to grow non linearly with level, so that rather than hit a a lv25 mob for 2x what we hit it for at 25, we hit it for 5 to 10x as much. We can see this in game, just go to the wards and look at the base damage values of weapons as a function of level to see that.

What I am trying to say here, is you have to look at all aspects of the game, and make sure your change doesn't break other parts. The case in point here is Ifrit. Yes, Ifrit can be done naked, but everyone takes this fact as a rush to say that character stats need to be adjusted, without taking a second to consider how it affects other parts of the game. The correct solution after considering other parts of the game and their balance, is that Ifrit's stats need to be raised.

Thats why i laugh at peeps looking like total idiots trying to get many stat points + when instead they can have like 5 less points and actually look awesome...
Honestly the reason base stats on gear are so low-pre materia are exactly for this reason, to allow people to equip items for the visual aspect and then put materia on for stats. I posted what I think is a far better alternative that doesn't screw over raid/NM gear here. However, have you actually parsed against any of these "total idiots"? There are reasonable limits for both cases.