Do you remember basketball being advertised as a key cornerstone of the game before SA's release the same way golf was advertised before V? Basketball was an out of the way mingame their solely for the purpose of a quick piss about..A quick piss about in SA is a key feature in V.
No but I also don't remember R* advertising golf as key feature. In fact, the way they advertised the whole game is probably a lot different than the way they did it with SA so that's not a good comparison. They made gameplay videos for V, something they have never made for a GTA game in the past.
But I understand you. Those side missions in SA rewarded you with things like being fireproof or having more health while in V the only thing you get is money, but that doesn't matter. The game is about committing crime as you said and those missions are the complete opposite of that, therefore this argument is invalid because this applies to both games. The thing is GTA is more than just a crime game. It's pure satire and it depicts the way of life in America, while the focus is on telling a gangster story and this has been that way since GTA 1.
I think people just can't get over the fact that R* took a realistic approach with IV and with V they expanded on it, trying also to please a few ones that wanted the over the top fun of SA back (tanks, minigun, fighter jet, etc...). So some of those rewards in SA wouldn't make sense in the newer games and I don't miss them tbh. But that's my opinion, everyone has his own. You said the voice acting and the dialogues are bad, and the story.. IMO, all these things are miles better in V than in SA, except the voice acting that was pretty good in both games.
Opinions, but the sales speak for themselves, V is the most successful GTA game ever, and it's still selling and selling games. A lot of people enjoyed the game and if they release it on the next gen they might sell more than 10 million copies on XBONE and PS4 combined. R* can be proud of that.