Here is the reality with ARC (eARC)-- Don't count on it working as you expect, or at all! Each manufacturer may implement it a bit differently, so you may have difficulties, oddities, or just a complete non-functional setup in this configuration.
IF it works for you, with your equipment and setup, then it can be a quite nice user experience!
All you can do is try it and see!
I also tend to prefer the "classic" approach where everything goes to the AVR. BUT....my new LG OLED TV has the Magic Remote which is AWESOME! So, to be able to use the magic remote to its fullest as a universal remote (and easiest simplest), I went with my usually non-preferred approach of connecting everything to the TV and using eARC protocol.
To my great satisfaction, it "mostly" works exactly as intended! I do feel that I got a bit lucky on this, it can be a real headache. Now, I do have just a couple of minor quirks. If I go to a particular input, then back, then I the audio never switches back correctly, and I have to either power cycle with the TV remote, or get the AVR remote and press a particular button. This is a minor annoyance, and the way I have it set up and use it, I may have to deal with it every now and then, but not continuously or daily. In the big picture, I accept a small sporadic annoyance due to all of the other benefits of how I have it set up.
EDIT:
@Methodical I believe mine is the LG C8....a heck of a nice display! Do you also have the Magic Remote? Man, I was sooooo skeptical that this remote was gonna be a piece of crap and nothing but frustration. It is one of those things that they better get right, or don't do it at all. Fortunately, from Day 1, I realized that LG got it right! That is the ONLY reason I decided to go the direct to TV and EARC configuration route!