There are definitely some complex statements out there that require considerable effort to understand. But those statements are vastly outnumbered by relatively

There are definitely some complex statements out there that require considerable effort to understand. But those statements are vastly outnumbered by relatively simple ones that are unreadable because the author did not follow best practices in writing readable and maintainable SQL. :( Having said that I agree with you that there is plenty of room for improvement in the SQL-language itself.