Assalamu alaykum. I love Quran 2:165 a lot. I am not sure when did the secularization of Agha Khans and Agha Khanis really began, because it is a global problem. Bohras are apparently less secular. The tragedy of secularization of ummah in general and Prophetic descendants in particular reminds me of two important quotes of Imam Zayn Al-Abidin(r) and Imam Al-Baqir(r). Imam Zayn Al-Abidin(r) said: Those of our descendants who are virtuous(muhsin) have twofold ajr(reward) and those of our descendants who are evil(musee’) have twofold ‘azab(punishment). Imam Al-Baqir(r): Our true lovers are those who are obedient to God. The word OUR includes the leader of Prophetic family and His praxis called sunnah. He also said:He is not our lover who does not stand up in tahajjud night prayers.
https://ismailitoislam.com/2014/07/24/some-quranic-verses-worth-reading-for-an-ismaili-muslim/