The amount that's useful (both in number of games, and hours per day) will be different depending on the person.
The basic principal though, is always to practice what you want to improve. If your want to improve visualization, then during games and training, push yourself to look farther, and be more accurate than you normally would. I.e. take yourself out of your comfort zone. "I want to be good at chess" so you play chess is not specific enough. Plenty of people play 1000s of games without improving at all.
But also we're not machines. If you "practice" 16 hours a day, you'll probably get worse. First of all there's a psychological burden, but also, of course, you run out of energy, and your brain stops working properly. At that point you can keep playing, but you'll only be practicing mistakes. (In reality what normally happens is even if you'd planned to do 16 hours you wont.)
So playing is good, but be purposeful. Be able to answer: What do you want to improve? How are your actions building this improvement? Then afterwards evaluate how effective it's been and change as necessary.
What's a better approach to develop abilities in chess, more chess games in the sense of more practice and experience, or less chess games in the sense of still playing games but having the kind of amount appropriate to avoid straining focus and losing?
I understand the unexplored assumptions hidden underneath, let's explore then.
By the way if one sees this and wants to troll, and be unhelpful, don't.