> company that operates 100% remotely in country X not necessarily can hire people from other countries (and let them work there)
Can't speak for French companies aside from some players in DefenseTech and Quantum, but for most American companies this is a solved problem already - we already have a legal entity in most jurisdictions or the ability to spin one up within a couple days.
Additionally, if an organization is spending enough to open a dedicated branch in a country (even if it's only going to house 20-30 people), we tend to get FDI grants and subsidizes unlocked.
Pasqual did something similar when opening up their American campus in Chicago.
> Having to go to the office 2-3 times per week, makes it impossible for my company to hire outside of Paris... which is idiotic
There's no reason to - you aren't getting a significant cost benefit shifting hiring from Paris to (eg.) Toulouse, and are only incurring an additional operational headache.
At that point you may as well open a Francophone development office in Rabat or Tunis, or shift the office to Bucharest or Prague because the CEE countries can outcompete France in ICT hiring subsidies.