The piece people seem to misunderstand the most is that total short interest won’t tell us if specific shorts were closed out. New shorts can replace old shorts at the higher price.
It’s like arguing that nobody could have lost their job or got a new job because the national unemployment rate was unchanged. Aggregate numbers don’t tell us about specific shorts.
Is it really so hard to believe that people would want to short the downside of an obvious short-term market bubble?