Typical double standard strawman argument from Mr Get Well Soon again. Similar to him being obsessed with 'exceptional genes', but defective genes are expressed in the Familee.
It really depends on who you are speaking to. You can better relate to the low class old farts and ah bengs / ah lians when you talk to them in Singlish. But when dealing with educated and professional people, you talk to them in proper English with proper diction and pronunciation. I can switch from Singlish to proper English with ease.