I do agree about ShellCheck being wrong sometimes - that's why I mentioned the method of disabling it for specific lines with a comment. When I first started using ShellCheck, it was highlighting lots of footguns that I wasn't aware of, but nowadays, it's very rare for it to spit a warning out at me - usually just for something like it not following a script or stating that a variable wasn't defined when it was.

I think the huge number of footguns is what makes BASH scripting fun.