When you go to the store to buy office furniture, you may still have to do some assembling.
I bought a desk and asked someone to put it together for me.
It functions fine after all these years. There is one nick on the inside. You can hardly see it.
When I bought a bookshelf, I had it put together for me.
It didn't hold up very well.
It didn't tumble or anything.
I found a craftsman who made me a bookshelf custom made.
Custom made is always solid and lasts a lifetime.