well... it's not the simple.
First of all, the Constitution can be changed, like it has been in this case.
Secondly, it says that “The law determines the conditions under which [..] (it) is exercised”
So it can be made hard enough to challenge the right to abortion, like it is now in Italy, where it is virtually fully granted, but practically impossible in some areas, due to a Constitutional reform (ironically) that transitioned the healthcare from a national system to a regional one. So it depends on who's in charge in the region.
Since 2001, a decisive transition is taking place, from decentralisation to true federalism, according to the principle of subsidiarity. As of 2001, the national health fund has been abolished and substituted by taxation yield directly attributed to Regions and autonomous Provinces
https://www.salute.gov.it/resources/static/primopiano/unione... (PDF, page 92)
The Tenth Amendment makes explicit two fundamental constitutional principles that are implicit in the document itself.
•The federal government is only authorized to exercise those powers delegated to it.
•The people of the several states retain the authority to exercise any power that is not delegated to the federal government as long as the Constitution doesn’t expressly prohibit it.
https://tenthamendmentcenter.com/the-10th-amendment/