Unless the game does not make a profit then it really doesnt matter.
Gta 5 was far more expensive to develop than metal gear 5.
Kojima was also creating a game engine on top of developing the game and I'm sure konami wasn't against that. If konami was actually doing something important with their other game franchises, which should be just as profitable as the metal gear series if managed right, they wouldn't have to rely on just metal gear and pachinko machines to generate a profit.
Metal gear solid 5 cost 80 million to develop, grand theft auto 5 cost 265 million to develop. Take two didnt go broke making gta 5 because they have other franchises that also generate a profit so they weren't just relying on gta 5.
265 million to develop for a game that
SOLD 95 million copies and generated over 6 billion in net profit...
How much money did MGSV make Konami? According to wikipedia MGSV only
SHIPPED 6 million copies and had to do 3X the development cost for net profit...
Rockstar also built the RAGE engine from the ground up simultaneously with GTA4 just like Kojima did with MGSV...GTA4 is another title that generated over a billion dollars in net profit...
I also don't think its at all fair to compare T2 who is as large as EA to a small publisher like Konami...Of course T2 is going to be able to churn out more games while Rockstar cooks their next blockbuster...You can easily see why Konami, who don't have the same financial resources can't afford to develop other titles while Kojima takes up the entire games division budget...