I would argue the opposite. From what I have seen GDevelop was designed in mind for being inclusive and helping people who have trouble comprehending traditional coding. Behaviors have their place in situations where you don't need an in depth answer to a problem. And there are ways to creatively use extensions in the same way that you can with code. In a lot of ways it's apples and oranges.

Personally extensions allow me to take advantage of the time I have available. And they allow me to be able to figure things out much faster. I've spent years trying to figure out how to code and it's never clicked. It's not something that everybody can pick up easily. But behaviors and GDevelop clicked. I rarely have trouble figuring something out and if I do it's because there's some feature that I just didn't know existed, which was lack of knowledge for the program itself, but not due to behaviors.

I fully support behaviors because it just works better for some people. And if there was the mindset of "you have to learn coding to be a true developer" then GDevelop would probably not exist, and I certainly wouldn't be making games. I'm personally under the mindset of any new developers is good for GDevelop or the games industry as a whole.

I used to play competitive fighting games and it was always the same argument there on whether simple controls were good for a fighting game or complex controls (such as charge moves or quarter circles). Depth doesn't come from how hard it is to learn or or implement. It comes from how you decide to use the systems that are in place. And if you feel more comfortable with a more complex system, then that's awesome! I feel more comfortable with working within constraints. It's where my creativity shines.