No, it’s just that normally nobody WANTS to stare at the sun but that day everyone will be.
Glancing at the sun once or twice won’t destroy your eyes obviously. Looking at it repeatedly for more than a split second as you’ll want to during an eclipse though…
If you’re in the path of totality you can look at directly when it fully covers the sun, it will be about as bright as a full moon. But that’s only a few minutes, then you can’t look at it (without protection) again.