Housing near work is mostly old Haussmannian buildings that are rent capped and where demand far exceeds supply, so most of the stock is unmaintained. You either accept bad housing in the city or live in the suburbs and commute — not ideal.
To make matters worse, French companies (especially old-school ones) have a culture of presenteeism for white collar jobs, it's uncommon for people to leave before 6PM and staying late is rewarded as high engagement.
Lastly, you might consider buying and renovating a house so you can escape this dilemma, but it isn't cheap: 2-bedroom (T3) around 700k euros, that represents 20 years of frugal savings on 90k gross.
Vacation, cheap and good healthcare, and unemployment benefits are great in France, but the current government has been eroding these social benefits, and those are not unique to France for well-paid tech workers anyway.