Can someone explain to me why countries like France are trying to raise retirement age and at the same time we’re having conversations about AI displacing most jobs in the near future?

Either we need people to work longer in the future because of longer life expectancy, or we're in the beginning of an AI/Automation revolution that will result in most of us having to retire regardless of age. Seems to me both of these can't be true at the same time. Which is it?