It really seems to vary wildly. I didn't think something like Bayonetta (the first one) would've taken only 4 days to record in its entirety, either way I still think Bayonetta 3 would've taken longer. The closest I've followed the behind-the-scenes of voice actors was with the cast of Guardians of the Galaxy, all of whom worked on the game for several years (albeit with mo-cap, not just voice acting, but still).

Profits are likely fine given that Bayonetta 2 has never dropped below $45 new and has sold about 2 million copies together on Wii U and Switch. With an estimated budget of $10 to $15 million dollars (maybe add a few million more for the port work) that leaves a ROI of probably 2-3 times after paying the merchants, with Nintendo getting the bulk of it but probably also Sega getting significant royalty fees for leasing the IP to Nintendo. 

The relationship with Nintendo does make it complicated.  They are publishing the game, but presumably they split that with Platinum in some fashion.  Well, Platinum and Sega.  Because it isn't actually first pary, Nintendo is acting as publisher, they still have an outside partner in Platinum and Sega they have to split with.  At least, that would be my understanding.  But if Platinum is paid up front, then that means they basically don't "make" anything on Bayonetta, Nintendo just funds their development plus tosses in extra after sales.  At any rate, Bayo 1 was a normal 3rd party release so my estimate there is probably still solid.  Could be a bit higher.

If Bayonetta 2 sold that much, that does help.  But the revenue still comes up way, way short.  And everything else I said still stands.  This is not some juggernaut money maker.  And most of that revenue either got sunk into marketing and merchandise and reinvestment into the company (Bayo 1) or sliced up into multiple pieces to satisfy various partners (Bayo 2 (as well as all that other stuff, though Bayo 2 was more restrained)).  

Oh and that breakdown is based on simple percentages that are pretty standard and has never, to my knowledge, been disputed. 

My broader point was, the revenue is way short of 450, let alone the profit.  And if you want to try and make estimates, use actual data.  Don't just pull numbers out of thin air.  I was doing a quick estimate with numbers from memory, you could do a more methodical one and get a more accurate picture.  But that picture isn't going to look anything like nearly half a billion. 

Where are you getting those numbers? 

Exactly what I've been saying. Also nobody is bringing up the Bayonetta movie adaptation that flopped hard. I'm sure that costed them as well. 

There's a Bayonetta movie?