One thing to keep in mind this that beginner grammar is the basic glue that holds the language together, and as such, it’s very broad and flexible in how it can be used. There might be many little things within any individual grammar point that actually take a lot of time to cover. For instance は is something that people will need to keep coming back to again and again as they study.
On the other hand, advanced grammar points are often narrow and apply only in limited circumstances, making them easy to cover fairly quickly. They become a bit more like vocab words at this point, in terms of how they can be presented and consumed.
That is to say… it really depends. Grammar points just aren’t quite the same as vocab early on, and it’s really important to thoroughly grasp them before moving too far ahead, due to how they build on each other.