Yes, exactly. You have come to the same conclusion as mine that a country cannot progress forever without heavy industrialization and by producing industrial capital goods and millions of tons of consumer goods.The economy without industrialization support is very fragile. For example, Russia. I remember Russia's per capita GDP in 2015 was 15000 USD., but in 2016, its per capita GDP was 8000 USD....
BD cannot even produce sewing machines and needles to start with. Even good quality nails are not produced. BD's present better economy is only due to the garments sector. Industrialization is still a few decades away. Whatever public works projects are accomplished is due to the infusion of Chinese, Japanese, and Indian money and technology.
There is almost no technology input by the locals. We are quite incompetent in mechanical, civil and all other engineering disciplines. This is why we cannot build our important bridges, and we cannot design and produce the machines needed in the factories. Yet, our BD brats talk 2041 as their target year to become a developed country. It is just a fantasy talk.
Unless BD does all the tedious jobs by itself no way there will be a self-sustained progress. It will come down like Russia or Brazil. The country will feel the pinch once the foreign loans are matured and BD has to pay back the money with interest. Self-help like it is in China or Japan is the best for a continuous progress.