Absence and omission in France - vanity plates

In my legal training, we learned much about the absence of action, or the failure to act, or an omission. So, sometimes in traveling it takes us a while to realize that something we take for granted in the US is missing here. Last night on our way to Aix, we realized in discussing French license plates, that vanity plates would be easy to create here since license plates are manufactured by local vendors authorized by the government (but not the government itself), but there are no vanity plates on any cars here. I cannot recall in all our years traveling here and around Europe seeing vanity plates from any European country. Although France prizes individualism and creativity, as a society certain rules are expected to be followed and apparently license plate creativity is not the individualism and creativity the society is seeking.