I'm an old time player so I don't know how a new player would truly experience this, but I think the three non destructible buildings in which you cannot change the recipe could confusing because they're the first such buildings you see yet they behave different than the real thing.
The first assemtly machine you get your hands on gives the misleading impression that: you cannot change recipes in it (since it's disabled in them), and, that you can't destruct them.
The feeders or loaders are confusing because those don't exist in the real game, yet this is the first method the tutorial shows as way of getting resources in the building.
The lab is confusing because it doesn't use electricity.
I think it's less confusing if the tutorial-campaign uses only buildings that behave like the real thing... because now you'd learn something that then soon becomes invalid
Just an observation. Maybe new players in reality don't have problems with it, in that case, no problem

EDIT: how about the following idea: instead of sending those iron and copper plates to those buildings that then auto-repair, how about sending them to the ship's reactor instead to repair that one first (after all, that's obviously a non-standard building so not confusing if it behaves differently), and then once you have the reactor, you have an electricity source and can use it to bootstrap *regular* assembly machines and lab?