I guess they feel the F-22 will do what they want more than the F-35 will, despite them not knowing most of what the F-22 could do anyway?
Besides, if it succeeds the F-35 will be more advanced than the F-22 by virtue of being a 15 years newer design.
Not that it matters as Congress seems dead set against anyone else having F-22s, and by the way they complain about the price that seems to include the USAF as well.
Maybe Congress would allow a situation like we used to have with nukes in the 50s? Where we had US-controlled nukes stationed on foreign bases for use by foreign air forces with US approval... In other words, the planes are paid for by the gov't that wants them and operate as part of that gov'ts air force, but are crewed and maintained by USAF forces to prevent "security breaches". Granted it sounds like a raw deal as you spend the money but only get to give orders, but if you TRULY believe "only the F-22 will do", this may be a way to appease the paranoids in Congress.