Connecting to any of the other interconnects would make absolutely no difference in this case, where the issue is a hurricane knocked down trees and power lines. The Texas grid has functioned just fine every single day since the 2021 ice storm that landed it in the news. What’s happening here is a local outage like would happen in literally any city that experiences a severe weather event
Edit: Lots of downvoting but no one explaining how connecting to another interconnect would make any difference at all here. For context, Hurricane Beryl and Hurricane Sandy made landfall with the same sustained wind velocity. Sandy knocked out power to over 6 million people for days in NY and NJ