I think you’re not understanding the intended slam.

‘Snowflakes’ are special and unique. (Notably, their crystalline pattern)

Every snowflake is special and unique. (Every single one has unique environmental factors that form their unique shape)

If every… ‘thing’ is special and unique, no ‘thing’ is special OR unique.

It’s basically saying “you value your perceived characteristics higher than they actually are valued in the grand scope”