I’m absolutely steadfast on Shi’ism and it’s fundamentals and I believe it is the right path but I’m unsure why Shias say "Ya Ali Madad" when it says in the Qur’an Surah Fatiha that we only seek help from Allah (s) and Allah (s) alone. Asking Allah (s) to accept our dua for the sake of Imam Ali (a) makes sense to me but "Ya Ali Madad" which is directly calling upon Imam Ali (a) and asking him for help instead of Allah (s) doesn’t make sense to me. What is the justification for this?

1- The Qur’an tells us that those who die in the way of Allah are alive and receive their sustenance from Allah

2- Imam Ali (a) receives special sustenance from Allah and Allah has granted him the power of Shafa’a (intercession)

3- When we say “Ya Ali Madad” we are asking him to intercede for us and help us from the sustenance Allah has given us