They want to release the perfect games with no bugs. And they already did take 7 years. Humans are not perfect. You cannot expect from yourself that you can actually build something perfect without a weak or bad point on and within it. Same with the Titanic, an exaggarating example but they also said WOOO ship cannot sink no matter what. It crashed at not a high speed against a floating Ice peace. And it was badly damaged with all the bad things.
To get to the point on Bannerlord, they can't do it. There will always be small bugs. So if they don't want to accept that thought, then the game will never be released indeed.