Is healing all of people’s parallel lives necessary in order to prepare humanity for ascension to take place? Is this why the Lightworker Healing Protocol will truly be the key to save humanity and allow meaningful progression to higher realms?

It is indeed the case that full healing is required for the ascension step to come, and also that that full healing will not happen unless all time domains are reckoned with. If you think about the logic here, it is quite compelling. As all lifetimes are happening in the now, they are always relevant, and they are always influencing things in the current life through the looping of time. Any attempt to ignore this will result in a setback, because it will be too big an anchor on the chain, so to speak. This will not be so hard to do because the need is not infinite and will not necessarily represent a huge discomfort or inconvenience either. It is only a question of going through the steps of the Protocol with that part of the subconscious in tow so it can weigh in about what is being experienced and felt, and be of service to keep things in alignment, and to make strides for the part of the person still suffering from an apparent disconnect.