I agree with your sentiment, but the way the feds control the states is by threatening to withhold federal funds for education, highways, etc.
But when you go the secession route, you no longer care whether you get federal funds, because you will not then be paying all those taxes to DC.
the states could actually withhold the money from the feds until the feds agree with the states. Starve the beast. I would not mind Texas not getting any fed money as long as there were no funds from Texas going to DC. Once that starts, then the 10th amendment is relevent again and the Political Mafia is out of business.