yes do yourself a favour and enable USB debugging, if your phone won't start up in the usual manner you are gonna need to USB your way in. no downside.
So are we any closer to fixing our phones yet. tried the sideload ADB but cannot see the device in the recovery mode, remember cannot turn the phone on so cannot do USB Debugging enabled/disable.
you are not alone, same problem. Although I probably know less tech stuff than you. I am supposed to be playing the guitar not fiddling with my phone :(