Yes, that document is a PROPOSAL, not an official document. When you view it, notice the info in the top of the left column.
So there's still a chance that the mountain will be open in June!
Please email David Andersen (his email is toward the end of the document that ace posted) to provide him with your feedback. Here are some sample comments that I've come across:
"It has come to my attention that the US Forest Service is proposing to close the Whitney Zone until June 30.
I believe that by closing these areas, you are forcing citizens into smaller areas, thus causing more human interaction. To ensure social distancing, please keep all public lands open for foot traffic, bike traffic, and vehicle traffic."
"Thereís a balance between physical public health and mental public health and itís a tricky line right now, but I urge you
to consider the mental health ramifications of further shutdowns of recreation areas."
"I fear that these closures will push people to do stupid things or go to more remote areas which will have worse impacts to the environment or greater impacts to rescue services."
"As our number of Covid-19 victims continues to decrease, we should be relaxing restrictions, not expanding them"