Earlier quoted context omitted.
For me nothing changes. 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…
Where I am, we have personal pension plans. You can check "what kind of pension is waiting" by going to the pension fund website and checking. Gov't doesn't play any role in any of that -- except (a) prescribing mandatory monthly payments and (b) determining the retirement age. (You only get small gov't pension if you haven't collected enough in your personal plan.)
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.