This is more some kind of a "beer religious" question.

Many people would never ever mix anything into a beer but other people love the cool taste.

I prefer to put the beer even into the freezer and not ice = water into a beer.

With my beloved @dandegrischdine we discussed this a few time to agree we not agree.

But a mixed beer = refreshing drink could
Easily get some more water.

So everyone has his own rules