As the author of that answer...

As a long-time walker, I see too many people hit the hills who are completely unprepared. Most mountain rescue calls are for those people. If you'd said in your question that you've already done a fair bit of day-walking and you wanted to move onto longer trails, I would have replied with that in mind - and it would have been a shorter answer basically saying "try it and see". :)

Your question asked for information like you get for a "new runner" though, and as the partner of someone who's just started running training, I know those assume you have no running experience whatsoever. As you'll know, walking with a full pack is hard. If someone has never walked before, it's simply too dangerous for them to go straight into that without working up to it. I see no difference between warning beginners to walking that they aren't ready and they shouldn't do it, the same as (like I've done elsewhere) warning beginners to electronics off playing with mains voltages.

One thing you definitely said in your comments was that my answer added no information. I'd listed out a lot of areas for training, including the areas of the body which will need strengthening, and a few ideas of key skills to develop. Clearly they don't apply to you - but they definitely apply to a beginner, which is how you asked your question.

As the author of that answer...

As a long-time walker, I see too many people hit the hills who are completely unprepared. Most mountain rescue calls are for those people. If you'd said in your question that you've already done a fair bit of day-walking and you wanted to move onto longer trails, I would have replied with that in mind - and it would have been a shorter answer basically saying "try it and see". :)

Your question asked for information like you get for a "new runner" though, and as the partner of someone who's just started running training, I know those assume you have no running experience whatsoever. As you'll know, walking with a full pack is hard. If someone has never walked before, it's simply too dangerous for them to go straight into that without working up to it. I see no difference between warning beginners to walking that they aren't ready and they shouldn't do it, the same as (like I've done elsewhere) warning beginners to electronics off playing with mains voltages.

One thing you definitely said in your comments was that my answer added no information. I'd listed out a lot of areas for training, including the areas of the body which will need strengthening, and a few ideas of key skills to develop. Clearly they don't apply to you - but they definitely apply to a beginner.

I'm sorry if the answer doesn't quite give you what you, but I answered the question you asked.