I have small hands and still fingertip basically all the time, and I have all my life. I don't use a small mouse either (G502)
I hate how smudgy and uncomfortable it feels to have reduced fine control when my palm comes into contact with the mouse. It feels icky and frustrating. I know plenty of people palm grip with low DPI and big mousepads to achieve fine control, but that seems far more exhausting than just developing stamina in the forearm.