It doesn't matter? Are you serious?
I think it should matter somewhat! Never in the history of the game have bowlers had so much assistance from technology. If these were golf balls, they would be banned! Today's bowling equipment is sooooo much more powerful than 1990's urethane which was soooo much more powerful than anything before it. This is just the tip of the iceberg. 3D CAD analysis allows dynamic modelling of balls before they are made, mathematics that was simply incalculable 20 years ago is run overnight on minicomputers. You've never had so much muscle in you bag.
So now keep your end of the bowling bargain. Get some light hand weights at a sport store and practice curling your wrist and forearm! Some spring grips can increase your finger and grip strength enormously, just be gentle to start with both these things. It's gotta be worth 10 pins a game after a couple of weeks! And I promise, no more 5-7-10's!