Difference between Judaism and other religions

Hello. In the past, I believed that the Mount Sinai stand was a place of revelation of God to the eyes of all the people, but the more I delved into the matter, the more I realized that even from the verses in the Torah it does not mean that way, and that only Moses heard His word. Here, for example: It is written, 'Face to face, etc.'" and a verse later, " I stand between the Lord and your children to tell you the word of the Lord." From the descriptions in the Bible, it means that Moses convinces the people that the Lord is speaking to them. So also in the parsha of Jethro: 'Speak to us, and we will listen, but let not God speak to us, lest we die.' At the time of the Ten Commandments, this is what the Torah means: the Lord spoke through Moses and not by voice.
Furthermore, the description of the Mount Sinai situation seems to be quite accurate. A terrible volcanic eruption, but not as something supernatural. It is also known that this area of ​​Jabal Musa has remnants of volcanic activity.
What prevents us from actually saying that the people and Moses were mistaken about natural phenomena? How does the Bible imply that they experienced a revelation? I suppose that I too, if I were not familiar with technology, might think that the gods reveal themselves to me from stones (telephones) or from boxes (projectors, for example)
thanks