Strictly speaking – absolutely true.
In fact, I would argue that it is achievement that brings us true happiness.
Consider this, however……
Achievement is possible only when one’s resources & aspirations are in alignment. And given the role of money in our world today, one can hardly dispute that it is most useful in helping bring one’s resources & aspirations into alignment.
Clearly, money does indeed play a pivotal role in the achievements which do indeed bring us great happiness!
So rather than parroting the tired old refrain that “money can’t buy happiness”, perhaps we’d all be better served to keep in mind instead the following from Mark Twain:
Prosperity is the best protector of Principle.