You don't need to actually reinstall to fix this. You can boot to single user mode and then you're root. Fix the permissions from there.
Even if you've accidentally removed permission from chmod itself, you can use the linker trick to fix that (your LLM can explain that one but use a fresh context so it's not roleplaying where it doesn't know how to fix without a reinstall)
Even if you've accidentally removed permission from chmod itself, you can use the linker trick to fix that (your LLM can explain that one but use a fresh context so it's not roleplaying where it doesn't know how to fix without a reinstall)