Well, isn't that special. Apparently you think the laws passed by POLITICIANS supercede the laws laid down by PARENTS. IN MY HOUSE, you are minor until you are 18, NO MATTER WHAT politicans (in Texas, or anywhere else for that matter) say the law is.
In MY house, you are a minor as long as I'm responsible for feeding you.
Feel free to make your own fantasy laws to your hearts content, but they won't hold up in court. You might for example decide that in YOUR HOUSE (emphasis yours) your kids are minors until they are 29, NO MATTER WHAT (emphasis yours) and that the politicians of your state or anywhere else have no say, but I'm afraid you'd find the reality that smacked you upside your head is markedly different than your fantasy.