Your point of view is within 12 days. Apple's looking at this over a span of at least 5 years to decades for their triple A games business. Their primary objective is to grow the market for future iPhone handset sales. It takes time to do so. App Store revenue is a secondary objective.
If it fails in your mind then that's just 1 title that Capcom likely making gravy for a new platform. For Apple it's a drop in the bucket for advertising expense telling the world you can now play $60 games on iPhone, iPad & Mac.
Imagine yourself deciding to buy a A16 phone vs A17 Pro phone.
Then you see a $60 game that is A17 Pro-only.
That may induce buying the more expensive phone as you would never buy a gaming PC or console to just play 1 game.
Why? Because from the buyer's perspective it is a waste of money to buy a gaming PC or TV + console just for 1 game.
Now, if the plan is to play 10 $60 titles then a gaming PC or TV + console makes more sense to do. Why? As others pointed out you can get the title for $12.
When buying things most consumers look at utility, value for money and other things important to them.
Billions of smartphone users will never buy a gaming PC or console as they do not see the value in them especially when they have zero plans to play more than 1-2 $60 games.
Again, different markets.