The national grid works because it is regulated. If you allow states to hookup their garbage unregulated systems to it, there would no longer be a regulated grid and the entire system would be made vulnerable.

It was the refusal to follow the same rules everybody else plays by that caused the problem for Texans, not the fact that rest of the country has standards and insists that they're followed.

The regulated grid works. The "we don't need rules" grid failed, and it will continue to fail Texans until they care about themselves and families enough to demand better. They don't even have to demand connection to the national grid, Texans could just demand regulations for their own grid that are even stricter than the national grid's rules and stay separate. Texas could create a system of regulations that make their grid the most well-run grid in the country.