Exactly. The DC ties with the other grids are small and can only import <1 GW, but even if they were larger it wouldn’t have mattered much in this case. TX was pulling 600 MW from the Eastern grid but even that had to be shut off because Oklahoma, Arkansas, Louisiana, Missouri etc were all under blackouts too. The other grids had no spare electricity to share.

TX also has ties with Mexico, but those were useless too because even Mexico was hit hard by this storm and had blackouts all along the US border.