I’m fairly certain you missed the point.

Development of a cutting edge emulator takes effort because you can’t brute force your way. It has to be efficient and also incredibly complex (all modern emulators are HAL or API reimplementations by necessity). Those emulators you reference didn’t require commercial amount of funding because they were created by the time emulated hardware was obsolete. It was a nice balance where Nintendo didn’t sue anyone. That is until Yuzu/Citra folks decided to enrich themselves in the process, bring Sauron Nintendo gaze and ruin things for everyone.