Hit the nail on the head, at what point do you try something else - how does that saying go "if you put your hand down on the table ans someone smashes it with a hammer do you keep putting your hand down?"
Regarding some other posts on here, I will be the first to say I'm about as far from a striper expert as you can get and still be breathing but I do pay attention and learn from it -
Striped bass relate to structure as much as any fish I have ever fished for, just becuase there isn't a flock of birds or the fish finder isn't all lit up doesn't mean abandon that spot run and gun to different spots.
Once you get to learn an area you know at certain tides the fish will show on structure and pounding that structure will produce fish, it will take methodical deliberate patience in some cases but the guys catching fish now in the canal I'm sure know if they stick with ceratin spots at certain tides they will score and they also keep ther friggin mouth shut about it. (Ha - I have to say I learned some of that from Manzi about a million years ago)
Are you guys fishing at night?
Had my 3 kids out yesturday, first drift produced 3 ~20 pounders, to start the day off with a triple and to watch the kids 'do the dance' around each other and the motor well before dawn - best fathers day ever! Only 1 fish over 30 pounds all morning but we were off the water by 9 and everyone had enough (I leave dealing with 3 sleep deprived kids last night out of the equation)