Cleats are so important for sports. In all there forms. Blade-like or plastic or rubber or even metal.
I couldn't agree more.  We are a little league and football family, so I am well-aware of the benefits.   I will admit to feeling the rubber ones are safer. 
I can understand your need for safety, and a lot of the decision has to do with with the play environment. 
Yes...dirt and grass do.present different needs.  When mushers and dog-sledder use those attachments to their boots, are those considered cleats?
Cleat (shoe)
Cleats or studs are protrusions on the sole of a shoe, or on an external attachment to a shoe, that provide additional traction on a soft or slippery surface. They can be conical or blade-like in shape, and made of plastic, rubber or metal. The type worn depends on the environment of play, whether it be grass, ice, artificial turf, or other grounds.
In American English the term cleats is used synecdochically to refer to shoes featuring such protrusions. Similarly
's grace ... Rather than resign, I would like to continue among you as your bishop and the father of our diocesan family until this stage of my life ends. I do not know how long that will be. I am most grateful for the ways you have cared for and so prayerfully supported me in recent years. You remain very much in my thoughts and care. As I am sure you understand, I am able to do very little, and will need to rely on others. Please can I ask you