I think they only reason people say they use throw or english to "help" them make a ball is because they can't aim at the real aiming point and are just hitting how they can make a ball. If you could hit the spot you need to, you should be able to do it with center ball and make the ball, if you need to put spin on the ball to deflect it to that point, you are just not aiming right in the first place and using that deflection to adjust. Yes you can have spin on the ball to help make the picket bigger so it spins in off the facing cushion, but if you actually need to spin a ball to find the hole, that's bad aim to begin with no matter how good you play.
When I put "spin" on the ball, it usually isn't to make the ball...it is to move the cue ball around the table after the shot.
A bit of deflection will allow you to have a bit more "swerve" or "hook" coming into the object ball which will allow you to change the angle some.
I'm not advocating which you should choose...choose whatever makes you play better.