Seeing and Being Seen Parashat Bemidbar

If it is a capital sin to see the articles and utensils as they are being placed inside their covers, how could the pilgrims see the Holy of Holies three times a year?

“Rabbi Katina stated: When the Children of Israel came on pilgrimage to Jerusalem, the parokhet [veil] covering the Ark of the Scroll was unrolled so they could see the cherubs embracing each other in sexual union, and the pilgrims would be told, ‘Here you can see how much God loves you, just as a man and a woman love each other’” ‏(Babylonian Talmud, Tractate Yoma, p. 54a‏).