I wouldn't universally agree. Just as we adults are all different, so are children. One can easily change jobs and go into communication, another can't and is extremely nervous. Children are the same. How could it be otherwise, since they will eventually become what we adults call.
I basically see it like you and would like to add another aspect at the same time: I grew up in a rented apartment and the fact that we could be evicted from our apartment at any time greatly burdened me back then as a child and teenager. It got to the point that I played out different scenarios to be able to assess this probability. Also, we have friends who bought a house. Now they have the possibility to acquire a free building plot. They use the mentioned house for counter-financing (renting or selling). Whether and from when that makes sense should be judged by others here.
To come to a conclusion: On the one hand,
if I were in your position, I would definitely go for the house and consider the argument
"but then I can't live so close to my old nest anymore" pretty weak. The new place will also offer the opportunity to grow close to your heart if experiences, memories, and friendships/acquaintances arise there. Sometimes you just have to dare. On the other hand, you have here served all pro and (your) contra arguments, not meant disrespectfully, on a silver platter and your gut feeling still says no.
By the way, I consider the intersection of "something in my old home becomes available at the right time," "we like it better than building new," "I can afford it," and "I have the chance to buy it" to be rather unlikely than likely.
What interests me : We are now at page 35 here and I don’t recall a single complete paragraph about what your wife actually says about the matter.