Now you're just making up stuff to support your claims.
No, I get called in every now and then by product developers a lot of different SQL companies to make suggestions about optimizers, standards conformance, and (let us be honest) act is sort of a neutral guy who wanted them in legal trouble if I tell one set of developers with another set of developers is doing (think of it as back channel diplomacy; so lawyers and NDAs do not get involved).
Most people here are not at all interested in creating portable implementations of their code.
That is probably true; and most programmers are not very good (I am sure you agree with that statement:-)). Most of them have less than 20 years experience, and most have not worked with really larger systems or really critical systems (by that I mean things that can kill or seriously injure a large number of people).
They probably have used one product (SQL server on this forum) and never had to leave it. They do not know about other products (Oracle, DB2, Teradata, etc.) or exotic specialized data products. Yet if their enterprises successful, they will find out about them the hard way. "“Forgive him Theodotus: he is a barbarian and thinks that the customs of his tribe and island are the laws of nature.”
- Caesar and Cleopatra, George Bernard Shaw"
Books in Celko Series for Morgan-Kaufmann Publishing
Analytics and OLAP in SQL
Data and Databases: Concepts in Practice
Data, Measurements and Standards in SQL
SQL for Smarties
SQL Programming Style
SQL Puzzles and Answers
Thinking in Sets
Trees and Hierarchies in SQL