Grip strength being directly correlated with heart health is a pretty ridiculous assumption. And while I agree that grip strength is important, it can never adequately keep up with back strength. Especially when you consider that your forearms are utilized in some way for 80%+ of the exercises you do Also, straps allow for an overhand grip vs an over/under grip which can increase the risk of a biceps tear. I also find that straps allow me to better focus on the muscle I am actually training, rather than worrying about gripping the weight. My rule of thumb is no straps until you have to adjust your lift (angle, reps, etc.) to accommodate failing grip. I certainly agree with grip strength being important, if you have to lift a car off someone you're unlikely to find convenient points for straps attachment.