The opposite should also be kept in mind. If we completely annihilate this practise. Somewhere down the line the deviants will win. Will they not fall into doubt regarding calling out Awliyah as it was done by other shuyookh/awliyah and now its completely unheard of? If istighatha is permitted, we can also allign our action so that this practise is recognised. If we completely stop just to accomodate a few muslims, this can somewhere ,at a later stage, question the aqeeda of our pious predecessors. So now stop khatme qadriya, khawajagan, 11vi shareef etc...just because some people might come into the musjid and get a wrong impression or fall in doubt?
Nobody is denying this. We all understand this well. But if you are standing at the mazaar of a great wali of Allah and calling out to him for help knowing ultimate help comes from Allah and that Allah has given these awliyah the power to assist the servants. I dont find anything wrong.
It is not always Shia. Here is Nurani Mia doing dua to Khawaja Sahib and the crowd saying Amin like dua:
This isn't about permissibility. No Sunni denies istighathah. This is about farq e maratib, delineating ranks. We should call on Allah, first and foremost. This is what Allamah Sharaf and recently Mufti Akmal have emphasised. Not every Muslim is aware of correct aqidah and we must align our actions such that they recognise it and don't fall into doubt or misguidance.
https://www.seekerspath.co.uk/quest...53-asking-for-help-from-the-friends-of-allah/ this should help you.
The way these people address the awliya at the graves is as if they are supplicating to the wali and not just tawassul. The guy raises hands and does dua to Khawaja, not to Allah Ta'ala, and the people say amin: