...are begging me to get salvaged.
In what way are you wanting to "salvage"? Do you mean there are typos you want to fix, or are you saying you can edit the question to not be closed anymore?
If it is the latter, I would probably not edit the question, as you will most likely be changing the intent of the OP. If you think the OP is just not asking the question clearly enough, using the wrong words, etc. then you should just leave a comment suggesting to the OP what they can do to help make their question better. This is what the comments are for. This way if your ideas match what they are trying to say, they can edit accordingly, and if not then the question can remain closed since it will stay in the same state.
If it is the former, then I would look at two things. First, try to decide if the question is still useful to future users despite it being closed. For example, perhaps before the question was closed someone still posted a great answer that has some good information in it. Second, is what you need to fix really that important? Is it a minor typo that doesn't really affect the question, or is it something that really needs to be addressed to help the question be much better? I do think typos should be fixed, but if you are worried about bringing up old, closed questions, then perhaps the severity or lightness of the proposed edit could help you personally decide if it is worth it or not.
So in my opinion, you need to make a decision on how important your edit is, how important the question is, and whether or not it is your place to make the edit you want to make. From there you can decide if the edit should be made or not. I would usually lean towards not editing, since I think it should be up to the OP to fix their questions if they are closed. But there are always special cases to consider, so I won't say never do it.
By "salvation", I mean to correct the spelling, fix grammar, convert normal text to Mathjax, etc. I do not intend to reopen that question by changing it significantly. I just want to lift it up to the expected SE standards.
I should note that if a question is closed, then fixing typos, MathJax, etc. will not raise the question to the standards of Physics SE, as the question will still be closed.