Three things:
1- Cutting out a cancer is not a complete option either. You cut the cancer out and it still comes back to kill you (I lost my father with cancer).
2- No one 'invited' the Taliban. TTP was created out of these same tribal folks. TTP are indigenous tribal people who sprung up as a response to Pakistani military aggression.
3- This point follows from the previous point and my previous post about the "Durand line". When the tribal people rejected division of the Pashtun belt between Afghanistan and Pakistan, it follows that any aggression inside Afghanistan will always have a fall out in Pakistan's northern belt and vice versa. In fact, the Pashtuns on the Pakistani side are at least 3x more than in Afghanistan. The Pakistani side is therefore THE ACTUAL hub of all Pashtun activity. The day America decided to attack Afghanistan and oust the Taliban any person who is even remotely aware of the geopolitics of this region could see that this would affect Pakistan's northern belt (and all of Pakistan by extension).
Lastly, just to reiterate the proper sequence of events, please note that when the Americans came after Taliban/AQ in Afghanistan it was the logical drift that the Talibs would move into the tribal areas for cover rather than just hang around in Kabul and Kandhaar and make sitting ducks out of themselves for American bombings. The Afghan Taliban (and AQ affiliates) were naturally being given cover in our northern belt (because since 1996 they - i.e. the FATA tribals - had given allegiance to Mullah Umar). The Talibs would regroup in the tribal areas of Pakistan over the winter season and launch their offensive inside Afghanistan through spring and summer (and this continues till date).
In 2003/2004 America - being the smart asses that they are and knowing the history of the region - ratcheted pressure on the Pakistani army to go into the Tribal area and prevent the movement of Talibs and prevent them from regrouping. Obviously, this would NEVER sit well with the tribal customs who are blood brothers of the Afghan Pashtun. So the resistance began and Musharraf's buckling under American pressure had a terrible fallout that we are still paying the price for.
Pakistan should have steered clear of this American problem. I still say that if the Americans want to control the region on their terms then the Pakistani army should just admit that they are a bunch of jokers and tell the nation that they can't stop either the Taliban nor the Americans. Just tell the damn nation that we don't have the balls to say 'no' to America so please forgive us for allowing the Americans to go into Waziristan themselves. If we can allow drones in FATA then we might as well go the whole nine yards.
The tragedy here is that the Americans are smarter than this. They KNOW the cost of going into FATA. They know from history that it is North/South Waziristan that is the killing field of the Pashtuns. They know the terrain there is such that a regular army is just doomed to fail there. That is why America is fighting the ground war in Waziristan through its Pakistani lackeys and only committing itself in there with drones.
Pakistanis HAVE to be the dumbest nation on Earth. These pro-war 'liberals' (bloody, liberals are supposed to be anti-war by definition!) are just a good example of that.
FATA guys couldn't keep it together. They invited the Taliban. Sheltered them. Supported them. The Taliban are killing Pakistanis. I think Waziristan's allegiance is fairly obvious by now. They don't give a crap about Pakistan. As for other geographical locations, for example Kashmir, Bangladesh, Delhi?, etc. they are not killing Pakistanis everyday all over Pakistan. But Waziristan is like that cancer that has grown and grown and has now metastasized. It is now spreading all over the country. Cancer has no cure. You cut it out.