They are absolutely important, since these are exactly what the Wii Shop checks.
It's quite possible there is a bug with the extraction process. I'd suggest opening an issue at bugs.dolphin-emu.org.
Quote:On a side note, I think I encounter a bug with the BootMii extractor feature. When I extracted my Regular Wii NAND with the tool. There was nothing in either the ticket or the title folder. I had to manually install the Wii System and IOS wad.
It's quite possible there is a bug with the extraction process. I'd suggest opening an issue at bugs.dolphin-emu.org.