bc someone might still be dependent on certain services that he or she wasnt able to replace just yet.
Also: "perfect" is a the arch-enemy of "good". Every bit of de-americanization, de-corporatification counts, and comments like yours somewhat disencourage people to even begin the journey. Bc "why even degoogle my OS, if I cant degoogle from that one since particular service 🤷". It's the same reason some people are not fighting climate change. Why care for my CO2 emission, if India or China wont budge?" We wont score perfect, so I wont even try."
That concept is called Practical Utilitarism