Private pension contributions are also tax deductible and don't actually have to be used for retirement (you can use it to fund a first house for example)
Other things that you can take off your tax bill include alimony payments, charitable donations and investments made in certain French initiatives.
So yes, there are many ways to legally reduce your tax bill quite significantly here.
- Owning a flat and rent it to a thrid party. Many fees on it are deductible.
- Investing in medium/small-sized companies.
- Making property/housing more energy efficient.
- Invest in accommodations for disabled/elderly/etc.
- Fees for the studies of your kids.
- Support/Invest in art / creative related enterprise.
- And many other that need to be checked.
That is not exceptional. Many European countries have similar taxes credit schemes.