Fine, here's a guide that details it a little more clearly. Note: this guide is somewhat outdated so when you see download links for Hekate, use the one I linked you to instead since that Hekate is more up to date.
https://gbatemp.net/threads/switch-hacking-101-how-to-launch-the-homebrew-menu-on-all-fw.504012/
A good enough tool can do a NAND backup leaving as little trace as possible. All you're really doing is copying the files onto the SD card. Think of it as dumping your cartridge. And one use that some people may resort to is using a NAND backup made prior to using any hacks and going online with it. At that point, the only ban risk you would have accumulated from that NAND dump is by running Hekate and dumping the NAND. Far safer than everything else that is possible but possibly not foolproof.
Thank you!