I'm new to mongo still, but isn't it pretty rare to ever need to make a query like the one in the example with mongo? My understanding is that the (one of the)

I'm new to mongo still, but isn't it pretty rare to ever need to make a query like the one in the example with mongo? My understanding is that the (one of the) whole point(s) of using mongo is that you can organize your data in a nested way so as to minimize the joins needed and just make simple queries, then only use the data you need.