>>33927851Abra was given its extraordinarily high stats so people would be convinced to use it. You see, Abra can't learn any offensive moves level-up until it evolves into Kadabra. Unless you give it a TM, it has no purpose in battle and it is even worse to grind than Magikarp.
Gastly is almost as bad because most of its moves are physical or status. It doesn't learn any good special moves until it evolves.
And both Pokemon's final evolutions occur through trade, so they get the additional BST increase just from the difficulty of acquiring a trade evolution.
Ralts is different. Ralts does not evolve through trade. Ralts gets the offensive moves it needs to be viable without TM. Therefore Ralts does not get that stat increase to convince people to use it.