Most maps completely ignore real-world population density and industrial/economic importance of regions. There are exceptions though; Issander's [`Real-life Europe`](http://warlight.net/SinglePlayer.aspx?PreviewMap=9440
) is a clear example.
If you prefer to value bonuses with big populations or strong economical importance higher, there is no need to convince the map maker; just wait for the map to be finished, then experiment with different bonus values. Once you've found something you like, make it a custom scenario and share the link.
One thing to keep in mind (and here I'm agreeing with Moros (and, judging by default settings, most other map makers for that matter)), this game is primarily about warfare. For instance, if you make a map of Europe where all territories are the same size (in real-world km^2) and bonuses are valued by population, nobody will ever go anywhere near Russia; it's just not worth the effort. Instead, the triangle England-France-Germany (with the ludicrously densely populated Netherlands right in the middle) will always be the theatre of war; for automatic distribution, getting two of your four starting location close to the Ural, in Northern Scandinavia or other sparsely populated areas means you've already lost. In short: that map will be no fun to play.