A couple hundred megabytes for an entire country's road system is not "huge".
How about you just actually use the app before you make baseless accusations.
How about actually reading people's messages before claiming they're making 'baseless accusations'.
The iOS Google maps does offline navigation. I used it just this weekend on a long distance trip. You have to download the data beforehand, but if you have downloaded the data for a region you can search and route to any destination you want.
Yes it can, you have to download the area in advance but I use it offline all the time as I have no mobile data plan on my phone.
And it shall remain that way as long as people work for free on a proprietary Google Web 2.0/3.0 application whereas they could do the same work for a FOSS licensed alternative (such as OSM).