Even if the world isn’t exploding in this specific situation, you must not forget that this thread could possibly have hundreds and hundreds of views over the next year. Perhaps even thousands or more. I do not want random people to visit this thread in a year and see your seemingly quick answer and just apply it, because they just don’t know better.
So yes, maybe in this situation nobody would be hurt, but you never know who else is reading, watching and trying to learn from this thread. That’s why my arguments are general, so everyone can profit from them, instead of just a single person in a single specific situation, especially if the situation at hand is extremely unclear in the first place, so recomminding such measure probably won’t solve the problem anyway.
The best way to find a solution to a problem is first understanding the problem itself as best as one can. The better you understand the problem, the better and easier to achieve the solution will become.
So instead of recommending something, that might not be even a bad solution, perhaps not even a solution at all, one should first ask questions and try to understand what one is looking at.
These are my reasons for why your attempt at a solution is a bad example for retrieving and providing an actual solution, which actually solves the actual problem at hand.
Then you are in my eyes extremely lucky, because I have seen, what feels like, tons of people screwing up their whole Linux installations because they thought, just
chmoding the root partition might make things easier.
Even if such an operation might be manually revertable, then you can still never be entirely sure if you maybe forgot some place that you need to revert. Then this curse will keep annoying you until you do a fresh reinstall, to finally and certainly get rid of that permission hell.