I disagree with the sentiment of the OOP, but this is and always had been a bad argument. Take a look at the Middle East if you want to see what aircraft does to guerilla militia forces. An AC130 can't patrol streets or breach doors. You need boots on the ground for that, boots that are 100% susceptible to gunfire.
Not to mention the fact that the federal government has lost command of the CBP, who are openly defying Biden's orders.
The enemy in the middle east is ready to live in a cave and use kids as suicide bombers to further their cause. I don't think folks accustomed to Costco and buffalo wild wings and healthcare are ready for that life.
I love a little bit of racism mixed with social inaccuracy. You're right that people wouldn't want to go without Costco or modern luxuries. That's why they'd fight even harder when the people in power told them that it was the evil federal government that had taken it from them and that if they just fight a little bit, things will be better than ever before. You're forgetting how dangerous of a combo that authoritarian govt. + uneducated population (which describes Texas perfectly) is.
Also,
healthcare
What Texans are accustomed to healthcare already lol?
I'm not being racist at all. One of the strengths of the middle east insurgent model is their readiness to live in primitive conditions. And, due to fanatical religious ideals, use tactics line suicide bombing. There's no evidence prospective texan secessionists are anywhere near ready for such conditions or tactics.