They do, 10 to all stats, and 20 to the primary. Paladin for Example, the 20 is to vit.
Arcanist -> Scholar gets +10 STR +11 DEX +11 VIT +0 INT +81 MND +41 PIE, for lv 50.

Then players that dont have the "best" build / job will have VERY hard time finding a party.
Maybe in Mor Dhona, but not from FC or DF, provided they play with people who have a brain, and their build is actually viable.