It could be less wordy, it isn’t perfect. I have definitely run into ones that require going through multiple layers of settings though, so this just seems a lot less bullshit than that.
Looking at the image again, default to not sharing while calling that ‘on’ and being slightly awkward is definitely not an accident and is probably designed to trick people paying no attention at all.
Seems like a lot of work to make VoLTE work on your phone. I have a budget Chinese phone from like 5 years ago and all I did was type in a code on the caller part and instantly got VoLTE without any interaction with my carrier (Vodafone) or any downsides at all.