Agree completely. I assume OP means major or minor 7th chord - they can't possibly mean dominant 7th, because...does there even exist a single blues song which doesn't have that chord?

And let's say you take maj7 chords - "you and me song", "you are so beautiful", "sing sang sung", "1975" - just off the top of my head. Pretty much any pop song which is melancholic sounding.

For min7, choose virtually any Santana song.

Even if you said maj9 or min9 it still wouldn't be remotely true. Otoh 13th chords....I think you'd have to reach to find a non-jazz occurrence of that chord. And it happens in jazz all the time.

I am pretty sure the analysis is: however the chord is notated in Ultimate Guitar, that's how it's analyzed. So if the chord sheet says C Am F G, that's exactly how it's being analyzed, even if that G is almost certainly acting as a dominant 7th, especially once you factor in what all the other voices are doing.