Do all people with bruxism need a splint?

Splints. Approximately 60% of the population will exhibit bruxism type activity during sleep wiith only 44% actually having tooth contact. Most people do not need an oral appliance for bruxism. When there is tooth damage, pain and/or dysfunction associated with it, then an oral splint is a good idea.
It's a Good Idea. The word "need" is tough. Anyone with bruxism would benefit from a splint, for sure. A splint will always be helpful in preventing tooth damage, jaw pain, and muscle pain. Bruxism never goes away, and it's unpredictable, so a splint is an easy and affordable way to control the destructive nature of this condition. It's definitely a good idea.
Yes mostly. The purpose of the splint is not to stop you from grinding because likely you do it at night, it is to stop you from damaging your teeth and supporting structures. A splint will help reduce the damage. Otherwise you will continue to cause damage that can lead to replacement of fillings, crowns.