clearstream
(He, Him)
As described, I understood it was knotted on the spot. It doesn't seem right to me to compare it to rappelling using prepared ropes, securely anchored, and a harness. If it seems to a DM that the situation is one that contains no risk or cost of failure, then they shouldn't call for a roll. It depends what is described to their players, and what those players described their characters doing.And both are covered in Vaseline, while a gale force wind blows several wasps into the eyes of the climbers.
We know there was a tower, a rope knotted and thrown up, and some climbing to do. Each group's imaginary version of that will differ: it very much depends on what was described at the table. We can't forbid a group from describing a daunting situation, even if for our group we end up describing a forgiving situation.