Mistwell
Crusty Old Meatwad
"Can my table focus on making things fun instead of optimizing?"
Sure they can, but have you thought about the fact that optimizing can be very fun and interesting to those who enjoy it?
I don't mind optimization at the table and expect it, however it can suck what makes the games entertaining for me out of the game. Usually it leads my players to want to speed through the levels because they want that next optimization point over just having fun playing the game - including failing and having things go sideways. I think you can roleplay and roll play but I may need to make a motivational poster that says, "Be interesting and entertaining" on the wall...players asked for options and then did the exact same options every single encounter. The script repeated fight after fight. I found it very unentertaining as a DM...Find a good effective combo and repeat ad nauseum.
I feel like his post addressed your question before you asked it. What did he fail to address? He's saying yes, people have fun with it, but it's detracting from his enjoyment of the game.