I seem to recall that same mantra last year.
Didn't work out so well, did it.
Now, granted, we likely were running him back out there before he was actually ready. I get that. But that might've been part of it, but I don't think it's all of it. Timing w/ receivers under real game conditions is a big deal. You don't just blow it off and hope for the best, imo. You prepare.
And Romo might be a back-up. But he might not be. That's the point.
This isn't the same as trying to get Mark Sanchez ready... it's just not. You wouldn't bother to get Sanchez ready b/c the evidence says you'd be spending valuable time prepping a empirically lesser QB. You risk too much in sending him in there by virtue of the drop off. That's not this. There is every likelihood that a healthy Romo goes in there and performs at least as well as Dak.
I get it, too, some might be scared that Tony would get in there and outperform Dak for one series, and it would just cause increasing cries for Dak to be replaced.
But if we're all about winning, then it's not about the drama.... decisions are made based on what is best for the cause of winning, not what is thought to best suppress drama.