Most of that is due to the strong push for promoting the local language as a sign of national identity during dictatorship periods in some of those rich countri

Most of that is due to the strong push for promoting the local language as a sign of national identity during dictatorship periods in some of those rich countries. E.g. the italian "Language Defense Law" (not sure of how to translate it to English but that's basically the literal translation of this Law) was established by Mussolini and later used as inspiration for similar laws in Spain, Germany and France. The spirit of such laws were basically propaganda. It dictated that dubbing of all foreign media was mandatory, so it had to be done for everything, regardless of it being a cheap animation show for kids, or a big Hollywood production. Also it introduced the opportunity to review the contents of the audio and apply censorship when deemed desirable by those in power.