That is not the point, many pilots lose their licence due to the strict conditions of the current medical when they are perfectly fit to drive and fly under less strict rules.
Research into accident records by the UK CAA shows that medical factors are not a significant cause of GA accidents and that a class 2 medical does not give any safety advantage over using the standards for a UK drivers licence.
Thre are no proposals to reduce the medical requirements for the carriage of paying passengers.