At Mount Sinai the Jews were forbidden to so much as touch the mountain:
[Exo 19:12-13, 21-24 ESV] (12) And you shall set limits for the people all around, saying, 'Take care not to go up into the mountain or touch the edge of it. Whoever touches the mountain shall be put to death. (13) No hand shall touch him, but he shall be stoned or shot; whether beast or man, he shall not live.' When the trumpet sounds a long blast, they shall come up to the mountain." ... (21) And the LORD said to Moses, "Go down and warn the people, lest they break through to the LORD to look and many of them perish. (22) Also let the priests who come near to the LORD consecrate themselves, lest the LORD break out against them." (23) And Moses said to the LORD, "The people cannot come up to Mount Sinai, for you yourself warned us, saying, 'Set limits around the mountain and consecrate it.'" (24) And the LORD said to him, "Go down, and come up bringing Aaron with you. But do not let the priests and the people break through to come up to the LORD, lest he break out against them."
But the author of To the Hebrews says:
[Heb 12:18 CSB] (18) For you have not come to what could be touched, to a blazing fire, to darkness, gloom, and storm,
What does he mean by "for you have not come to what could be touched"? Why is he saying that in the current context?