Optimized creatively does not mean stable software

They did say “creatively”.

It will be a buggy POS at launch, and cheating in the online mode will be rampant, but…

Like they are going to pay people to work on something for that long. Or maybe all of GTA 6 is being done by like 5 people so they can focus on what really matters-inventing new vehicles for GTA online.

They are making sure we know there will be bugs

Back in the day we called that “feature complete” or “the end of the design phase.”