Not to mention how they interact with the room, which is also kind of significant...
But yes, you're absolutely right, which is why fretting over 'flaws' upstream, in vinyl or otherwise, which in comparison are minor, is a little 'silly' to say the least!
I'd also argue that if you mainly listen to electronic music, which by its very nature isn't real, and manufactured, then it going to be difficult judging how 'accurate' the sound is that you're listening to, whether or not it's been recorded on a digital or analogue format.
Therefore, I'd contend that the only way to accurately judge the flaws of the vinyl medium is to use sounds that are natural and real [not electronic noises], and which through the years, our ears have become attuned to, and developed an accurate perception of, such as the human voice.
Good acoustic recordings of such have always been the definitive arbiter for realism, when it comes to judging the sound produced by hi-fi systems, or any of their constituent components.
I won't get into the 'source first (or otherwise)' debate, as I have differing views from the majority here, although I'm not a staunch source-first guy, so we'll save that discussion for another day
Marco.