Ultimately, we ALL have to decide for ourselves what God is saying to us. If we just read Scripture and pray for discernment, we have to internalize what we hear and "decide for ourselves'. If we just hear what some rando on the internet says, we have to internalize what we hear and "decide for ourselves'. If we just hear what the Church says about a subject, we have to internalize what we hear and "decide for ourselves'. So, it boils down to this:
If somebody tells me that the Bible means XYZ when I read it to say ABC and God through the Spirit tells me ABC, I can't take their word for it, can I? Just because some understanding is very old does not make it true today. I've held for a long time that every generation should take a hard look at the traditions they're following to see if they still apply or should be modified in some way.