That's not what he wanted to say. What he wanted to say is :According to USAF official, F-35 beats even F-22 in stealth. I don't like F-35 and love Rafale, but let's just call a spade a spade. Rafale can't match the RCS of F-35, thus F-35 will always enjoy superiority over Rafale in that area.
Firstly that passive stealth is not the alpha and omega of survivability. There are several other way.
Secondly there are Technical and budget prices
Thirdly in several bands (like visibles)the f-35 is very bad and can be seen at a much greater distance than any other planes.