The F35 is not just about shooting down enemy SUs / MIGs, it's primarily about getting in an out of places safely.
But only, it would seem, when used in conjunction with the Next Generation Jammer (NGJ) - which may not be made available to other F-35 purchasers....
Will F-35 Customers Get Advanced Jammer?
...........The Navy and the Office of the Secretary of Defense have not made any decisions regarding the release of Next Generation Jammer technology, although the NGJ is expected to be vital to the strike aircraft’s survival in heavily defended enemy airspace (see p. 48)......
Still to be determined is whether the NGJ system will be exportable to other JSF-buying nations.....