Comment by HDBaseT

Because privacy isn't represented as a binary.

You don't live life only having privacy or not having privacy. You fall somewhere in the middle. You can shift your overall privacy posture up if you de-google, even one service at a time.

Uninstalling Google Maps, whilst still using Gmail has privacy benefits. Each step improves your privacy. Some opt for convenience over privacy, you can pick and choose services to use whilst still retaining decent privacy.