A month or so ago coming out of California for Denver we held for a while. Then the weather dropped below forecast. We got vectored for the Cat III ILS, but when we joined the localizer A3 wouldn't arm. So we went miss. Figured maybe we set it up wrong so had them vector us for another one. Joined the localizer for that one, same problem. Diverted to ABQ and landed.
First thing I did was call the dispatcher and thank him for the extra gas he through on just in case. When everything is going to heck, a little extra fuel buys us time to figure out what is going on and come up with a plan. Solving a problem WHILE worrying about fuel is stress I don't need.
That said, I'd rather not tanker gas into the Burbanks and Orange Counties of the world either. It's a fine line.
Thankfully we have professional dispatchers who usually think through these things before I ever get the first look at the release.