The presupposition that goes into this approach, which is itself reasonable if you concede that presupposition, is that other aspects of current work culture like working conditions and working hours have to stay the way they are, in other words, that no matter how much automation happens we still have to prop up or even increase the total amount of time people spend working.
That's not the only valid presupposition. There's still value in raising the pension age even if all basic needs can be met with fewer workers than before.
As consumers, voters are going to keep valuing cheaper stuff and policies they believe will deliver cheaper stuff (and curbing consumerism is well beyond Macron's capabilities). Unfortunately, this often translates into an incentive to squeeze workers. The incentive is most strongly counterbalanced by the fact that voters are also workers. This incentive is absent for pensioners. If the proportion of the electorate which draws the state pension rises, the electorate is likely to make things worse for workers.
Giving people more time to do things other than work is a foundational leftist goal going back hundreds, maybe even thousands, of years. Let's not just give up on it now of all times in history.
I agree. We should have a four or three-day workweek, and more 62-year-olds should have a stake in making this happen.