It appears so innocuous. Just a little piece of beaurocracy to ensure everything is kept orderly and under control.
Licensing reverses the relationship between citizen and government. Subtly converting rights (absolute and unalienable) into privileges (revoked at a moment’s notice) as it permeates every aspect of life.
Free movement, for example, is a fundamental liberty. As with any other liberty any extension of our ability to move freely (e.g. vehicle, remote controlled device) is an extension of that same right and subject to the same qualification regarding respecting others rights. If you infringe other’s rights (e.g. by harming them) then you are liable to legal sanction. If not then you should not and would not be punished in a society that respects and upholds those rights (i.e. enables you to enforce them simply in a court of law).