The SR-71 was still able to out-run the MiG-25, and in its time, was able to evade the majority of surface-to-air missiles by simply going faster than them. Not to mention the fact that the MiG-25 and the SR-71 fit two different roles. The SR-71 is a reconnaissance vehicle with (limited and out-dated) stealth capabilities, the MiG-25 is an interceptor craft. You're comparing apples and oranges here.
You sound upset.
The Lightning II is loving adorable look at that
The Mig-31 is a better interceptor. A fleet of those could intercept a Blackbird if they catch one of guard or use multiple fleets to cut one off.
Also there is reason why the phrase jack of all trades master of none exists. The F-35 is an expensive multirole plane, you can only field so many of those. The 2nd issue that new radar systems and missiles are always being made, so in the blink of an eye the F-22 and F-35 could be made obsolete tomorrow if better radar systems and sams are put out on the market as well as better air superiority planes. Better to have a many fleets of A-10's, F-15s, and F-16s for the Airforce and a Fleet of F-18s and Harriers for the USMC than only a few F-22's and F-35s that could have its stealth made obsolete.
