Passing on your assets to your children and protecting your spouse from the vagaries of life are legitimate concerns for anyone who is concerned about the future of their family.
This means not only preparing for succession, but also anticipating it, in particular by taking advantage of all the tax benefits of gifts.
Passing on your estate means first and foremost knowing to whom it will be passed on at your death, and therefore knowing who inherits what and from whom. This means, for example, having a good grasp of the concepts of "reserved portion" and "available portion" before drawing up a will and making provision for any legacies.
But assets can also be passed on during your lifetime. For example, by making manual gifts or gifts between spouses, or more generally by making a shared gift to the children. But be careful to avoid the risks of disguised gifts.