Oil filter relocation help

Pardon my ignorance but...

Wouldn't an oil filter relocation only move the oil filter to some other location?

The 90deg adapter is a form of oil filter relocation.

Why would anything inside the engine be needed to be touched?

All the kits I have seen have a bolt on adapter that replaced the oil filter or the 90 deg adapter. The one in the photo appears to have a pipe plugs rather than an adapter.

Does that necessitate internal engine modifications?