The art of putting wavy lines across an axis to denote a range skip has atrophied, probably because few charting software packages support it ?
In my unhinged pipedreams, we’d have some sort of standard for conveying the data directly so users could use browser settings to decide how to display the data. There like a dozen people in the world that would use it, but they’d really really enjoy it I bet.
Readers are guilty too - they like to see wiggly lines wiggle. Nobody wants to see a graph that's just a horizontal line or shaded band. We want to peer harder at it to tease out any sort of signal that can tell our emotional brains "good" or "bad".