You're entitled to your opinion but TBH, if we undervalued everything by that standard, nothing would be connected.
The editor chose to put in a specific Superman '78 newspaper headline for a reason. We don't need Christopher Reeve's Superman to pop up and say "Hi" to Christopher Chance while beating the villain-of-the-week's ass to get a confirmation.
My theory of it being an old newspaper from decades prior is a reach, but the specific easter egg isn't IMO. The fans figure this out for a reason, because companies like DC and Marvel depend on fan knowledge for continuity's sake.