A major I chord without the fifth is two pitches, the first and third degrees of the major scale. That's what I meant. Why is that not anywhere close, or even n

A major I chord without the fifth is two pitches, the first and third degrees of the major scale. That's what I meant. Why is that not anywhere close, or even not precisely the same? I did not mean a major third interval. They could have sung the correct interval, but the wrong pitches. For what I did mean, I do insist that in the limited terminology of music, chord is a better fit because it implies the pitch where interval doesn't. This necessitates terms like "Power Chord". Pedants are going to say this is wrong. (And oh yeah a Koala Bear isn't really a Bear either.) But it does get around a limitation of the language.