I feel your pain, and I understand being irritated at the spread of misinformation.
It's true, various users have managed to achieve 100% brick with the correct update pack. As with most things in life, it isn't 100% guaranteed to work. The build used for the process makes a difference, however.
If you ever have any doubt about something, even just a little, do intense research beforehand. That's the only advice I can give.
It's quite unfortunate that you've suffered the fate of the brick (assuming it is 100% brick, and your recovery mode attempts just aren't working yet). I've honestly no idea how I was able to recover from semi-brick a grand total of 8 times before successfully downgrading on the 9th try.
Different users all appear to be getting different results from the tools available.