It's often a personality type thing, Naughty. For quite a proportion of people (there are only 16 Myers Briggs Types) every choice is a challenge - one of the choices is optimal and the others are not. And for some types that is an enjoyable challenge, while for others it makes them fearful that they may have chosen the sub-optimal option. It isn't just other games that have conditioned them to feel this way, but their cultural and social upbringing, environment, etc. Many people find choices stressful, and walkthroughs offer a simple reassurance, diminishing that stress (rational, justified or not) makes for a more relaxed, enjoyable experience.
Many of the choices can mean missing a joke, some can mean missing a scene, and in a few cases possibly an entire path, and there's not necessarily any way to know beforehand which of those types of choice has just been presented. You'd be amazed what anxiety that can cause in some people. And that's an actual percentage of people, not a fraction of 1%.
Now, that doesn't mean you have to have a walkthrough, or even colour-code your choices for severity or importance, or make any allowance at all. It's your project, and you get to choose who it appeals to, and who it will frustrate. I'm just pointing out it's a legitimate thing, and a real thing, and might be something to consider anew with an understanding of the perspective.