IMO the guidelines should be on by default. It's the first setting I change when I get a new phone or camera. Like you said even if you're not a "photographer"

IMO the guidelines should be on by default. It's the first setting I change when I get a new phone or camera. Like you said even if you're not a "photographer" it can make a huge difference. EDIT: Also even if somebody has no clue what they're for, it can help keep the image level at the very least.