I hope we can*, otherwise we’re doomed to never get better at...whatever it is we’re doing.
So simple question: how can we talk about best practices without being told it’s badwrongfun or onetruewayism?
EDIT: Changed the title without changing the first line.
Yes, but.... there's always a but...
We have to first understand that there is no one "best practices" for all of RPGs. Or even all of D&D. Best practices for dungeon-crawlers are not best practices for intrigue-aficionados, and so on.
You have have best practices for a particular desired result, but there are many possible desired results in RPGs.