Shorting that pin in the joycon rail to ground is only done to put the device into recovery mode. Logically, it's pressing the "home button" which doesn't exist

Shorting that pin in the joycon rail to ground is only done to put the device into recovery mode. Logically, it's pressing the "home button" which doesn't exist elsewhere on the console, along with the volume-up button while powering the console on. The actual exploit relied on a software bug in verifying what was sent to the device. Similarly, getting into the recovery mode on one of the DS consoles involved pressing a button combination on startup with the screen closed.