The benefits of a pension start before retirement. I can avoid setting aside a huge pile of money for the potential of an extremely long lifespan and then worry as minor changes to that pile become really critical near and in retirement.
Suppose you’re 50 with 2 million USD in savings. How soon do you retire and what kind of lifestyle do you live in retirement? That’s heavily dependent on what kind of pension is waiting.
Assuming it’s a defined benefit pension it can include guarantees like inflation adjustments. That’s the fundamental advantage which largely offsets the disadvantage of lower average returns.
I’m not saying putting all your money into a defined benefit plan is ideal, but due to the diminishing marginal utility of money a guaranteed minimum lifestyle is extraordinarily valuable.
However if all of the above also applies to savings accounts in the place you reside in, you can call it "a savings account" all right.
b) We have tax breaks for retirement savings accounts
c) Laws names are just a PR exercise, I’m sure you can think of several that don’t do what they imply.
But there’s little point in arguing over definitions when it’s clear what’s actually going on.
Not sure why their opinion matters.