They'd struggle even less by sticking to stock. Rooted Vanced works perfectly for me. But both those statements are kind of irrelevant. There exist a root-Vanced and people, for whatever reason, want to use it.Ok, admittedly I don't use Goole assistant, so i don't know about that with the NoRoot version, but all my links open natively in the NoRoot version, so i don't see a difference there. I also have no issue with installing microG, at least YTV works like a charm, while many people struggle here with the root version.
I'm just saying they might struggle less by tring to install the noroot version.