Ertugrul promotes positive nationalism and a strong loyalty to the Islamic cause. We see here how he always puts his nation, family, and religion before anything else.
In Pakistani dramas of today, the family system is portrayed as backwards, the father is oppressive and has hidden affairs, the mother/aunties (mother in law esp) creates drama and kicks people out of her home, the son is evil/wicked person who cheats, the poor innocent girl (daughter in law) suffers because of all.
The lesson portrayed here is that the girl would be better off somewhere else, this feminist and liberal toxic outlook corrupts people's thinking.
Turkish dramas like Ertugrul focus on loyalty above all else, even when your own family abandons you or does not understand.
The biggest lesson of Ertugrul is that the greatest enemies to the Islamic nation (Turkish nation included) are the enemies from within who connive with known foreign enemies.
This was the case even with the Prophet saws, when the munafiqoon of Madina and the Yahood made secret alliances with Makkan kuffar to backstab Muslims, while outwardly professing loyalty.
We Pakistanis already understand this lesson, but right now lack the courage to do anything about it.
If some serials like Ertugrul could instill some confidence in our people to do what is necessary, it can only benefit us.