Raids like the one on Abbottabad, for example, will be much more difficult to conduct without bases in Afghanistan. Instead of a short flight from a base in Afghanistan, they will need to be flown from carrier battle groups hundreds of miles away in the Arabian Sea. In all likelihood, the Abbottabad raid would have failed had it been flown from the Arabian Sea just like the Iranian hostage rescue mission failed in 1980. Too far to fly.
The United States Marine Corps just proved that they could accomplish the exact mission you claim is too far to fly.