Absolutely. Here's a question that's rarely asked....
After all the work your band has done to help out the headliner, what does the headliner do for you? In most cases absolutely nothing, not even a handshake or a quick listen to your band.
Take a look at the headliners at most P2P places. Most of those acts are on their way down, not up. The time where they had national significance has long past, and when they did, it was probably in a niche market anyway. Some of these bands haven't written any new material in over a decade and are riding on the recognition of their one-hit-wonder. Some of these acts have more name than game, but name recognition can go along way. Thus people will want to say they opened for them, even if it means shelling out some bucks to do it.
You have 1-10 local bands hustling their @$$3$ off to sell tickets to fund the headliner's guaranteed $2-10,000 while the locals get nothing or negative. The guarantee for the headliner that evening could amount to the total profit of each band's entire existence combined. If the headliner and venue are so great, then why do they need the local band to sell tickets? The headliner probably already has a website where you can buy a ticket, and they should have a greater reach than the local bands do. They should have way more likes on Facebook, more album sales, etc. With all that being the case, why put the burden on the local band to draw?
Because, the reality is that these headliners often need the local bands for the same reason that the locals pay money to open for them. The headliner needs exposure too, and they also want to expand their fan base. Chances are that the act's newest album isn't getting much play either, or the band is a new iteration that only has 1 or 2 original core members. The band may not have written any new material in ages and/or they have pretty much disappeared from any type of airwave.
Local bands should not discount their value to national acts. There's no doubt in my mind that the resurgence of acts like Journey and Bon Jovi had to do with their songs being cover band standards. There's no doubt in my mind that the resurgence of some acts out of the ashes, or move up the ladder are due to the following they developed via the fans of local acts that opened for them.
P2P has the elements of an abusive relationship. The abuser makes the victim feel worthless, and that the abuser is the only one that can really take care of them. In spite of all the abuse, there is a random silver lining once in a while to keep the victim roped in for more abuse, and the cycle continues. But the reality is that the abuser needs the victim more than he/she lets on, because without a victim, they have absolutely no power. Unfortunately in the music business, there is an overabundance of eager victims.