You're misinformed or just not being objective with what you're saying.
Turkey is a high productivity country, you are looking at GDP/hours worked which is highly flawed and its usage is criticized extensively. It gives countries like Norway/Saudi arabia/Ireland the highest productivity which is far from reality, they aren't more productive they have more natural resources in the case of Norway/SA and Ireland because its a tax haven.
Comparing african countries with no infrastructure, no economic deals and no education is just silly. You can't compare countries with tons of differences and only analyse one metric.
In this case young working age population is advantageous if other things go accordingly. Look at Italy for the counterpoint, Turkeys GDP per capita before covid was predicted to surpass Italy by 2050, mostly because Italy has a terrible dependancy ratio which is No of ppl working age/No of ppl retired age.
Education might be getting worse but not really, you have an overblown opinion. While i can't agree with the state promoting religion and such it doesn't have a huge effect.
A more important point is that 10-20 years ago only a fraction of people even completed High school level education, nowadays i think everyone completes High school level. And there are over 7 million university level students. Of course a saturation of educated people doesn't mean economic success but for a country who had very few people at degree level this is helpful in kicking off new industry/growth.
Its location will always be important, the fact that it simply sits between the two most important continents on earth gives it strategic significance. This isn't related to the Middle-east or anything.
Beyond this simple speculation its simply best to read up on reports done by actual economic experts who's job is to study future prospects of nations. PWC 2050 analysis predicts Turkey to surpass Italy in GDP per capita by 2050. With a predicted GDP per capita of $53,000, for comparison Japan is predicted at 63,000 France, 66,000, Germany 82,000, UK 72,000.
It won't suddenly become richer than Europe or anything but it will close the gap, which is a good thing because wealth usually = stability and Europe benefits from a stable Turkey.
https://www.pwc.com/gx/en/research-insights/economy/the-world-in-2050.html