I think you are conflating rights with actions. The system is set up to confer citizen rights -- in this case the right to vote for a representative of your interests. What you do or the representative does is a ymmv.
I will say that if you vote for me to carry out your wishes and I do the opposite, then if you vote for me *again* you have only one person to blame. In the case of Texans, they are either fools, or they actually got what they wanted ... until they didn't want it last week.
@mspohr 's and your argument that people lack the tools/information/intelligence/etc to act reasonable or in their own self-interest might be true but it does not matter, and the reasons it is so also do not matter in the sense that Democracy lays the responsibility for those issues squarely in the lap of the voter. We can both agree that Democracy works better when voters are not morons, but that is an opinion without any legal standing. I may decide to follow the lead of my local pastor or my favorite HS quarterback or the drunk on the corner on whatever issue it might be. I may be "unduly" influenced by the sweet lady in my bed. Not your right to infringe my right to be the biggest idiot in the world and to vote accordingly. Or not vote at all.
Welcome to Democracy.