I don't think it's up to us to tell people what editor they should use, or to refuse giving advice if they don't agree with our choice. For new users, and especially non-programmers, LyX does have certain advantages, namely being WYSIWYG, and the more familiar formatting and editing environment similar to e.g. {Open|Libre}Office or older versions of MS Word.
Think of it as training wheels - it can get you started directly out-of-the-box, but you will soon have to outgrow them if you want to perform a tricky maneuver or compete with the big boys.
If you think that a user is on the level when a new editor makes more sense -- by all means, do recommend it gently, and when answering, mention that this problem doesn't exist in editor X. But chastising people for not using a certain "blessed" toolset will not make them happy, especially when they are comfortable with their choice or have a valid reason to use Lyx.
People should be free to shoot themselves in the foot, if they so choose.