It is your second poll option that introduces 'better', not me as I didn't author or modify the pollYou are inserting the notion of making the beer better. That was not in the hypothesis. It was about whether you have to make adjustments.
There is a gap between the options "Yes, you have to" and "Sometimes, it may make my beer better" (my emphasis in both cases) In your hunt for confirmation of your opinion that "the majority of brewers make no adjustments", you've left off a significant option
I don't HAVE TO adjust my water, but I ALWAYS do because it has been proven to make my beer better. No fence walking that it MAY HAVE made my beer better - it's been proven that it DOES make my beer better all else being equal