This came up for me, too. If you tell a beginner they're being unreasonable, they think about the fact that the plane is $350. They think nothing about trying to make the same kind of plane in the western world with compliance, costs, benefits, support, etc.
They'll also think you're being a stodgy old jerk for telling them they may have a skill to acquire.
Years ago when I started to make double iron planes, it occurred to me that I could probably find buyers for them and make about $30 an hour for my time. IT also occurred to me that the buyers would be people I wouldn't want to talk to on the phone or email as they'd feel that I was obligated to help them when:
* they couldn't set depth
* the plane iron moved over the years and a little bit of relief may be needed laterally, just filed, etc (I need to ship it back to you and you need to ship it to me at your cost!)
* they found out the iron was not A2 or V11 and didn't understand why, etc
The skill set leads LN to do things like put a hard to hand grind iron in a plane and then tell the buyers not to use power grinders on it (perhaps with the exception of a tormek - a boat anchor in my opinion).
Assuming problems in life are due to someone else first and then asking the question of whether or not they're you as the user, purchaser, whatever the project may be - a very expensive way to live, if not in terms of the cost to purchase things to your standard, in the experience in using them.
(I've always had to ship planes fully sharp and set, too - but I've either given most away or sold them at cost of materials to professional woodworkers who would actually use them. If you couldn't sharpen and use them initially, who would know if they would feed perfectly? I can imagine the next white collar buyer complaining that he received a used plane).