Isn’t Ijma And Tawatur Just Opinions?
Yes but that means that before the recording of these rituals about a century or two later is inaccurate . And that eg salah is not exactly this way for certain
True, there is a possibility that the rituals have been drifted away from the right practice during the 1st century of the undocumented history but we need not worry about it as this is none of our fault. We’ve got no better means to find the truth other than relying on the perpetual practice.
You have to rely on khabre ahad to provide evidence against ijma. This is the challenge.
Recorded history is in no way better than ahad narrations, unless it’s relaying established history. There’s generally a single person writing a history book conveying his own viewpoint about something. Ijma and tawatur has an entire ummah separated by time and space that attests to something.