going to snap!

If I have to justify one more time why I'm 'still' breastfeeding my 6 month old I'm going to snap! 
Apparent I should be weaning and replacing feeds with water from a cup. 
Ummmm....why? Pretty sure breastmilk is way more important than water at 6 months old! 
Grrrr 😡
*Edit* I am offering solids as well as breastmilk. But have been told I should be stopping breastfeeding altogether. 
I understand that some people are unable to continue, or choose to stop and that's totally fine. But if my baby and I are able to continue, and want to continue why would we stop?