Is it better to use less shampoo to prevent hair loss?

I tend to use a lot of shampoo out of habit.

It feels like it washes better when there is a lot of lather, and that makes my scalp feel refreshed.

They say chemical shampoos are bad because it's a bad habit...

They told me to reduce the amount.

First of all, should I reduce the amount even if it feels a bit uncomfortable... like it isn't fully wrapped?