Clearly you completely missed my point. Ichigo has thus far died two times - both times at the hands of Ulquiorra. Both times Orihime had to ressurrect him. However, that was with his spiritual body which can sustain much more physical damage since the body is held together by spirit particles and the body can thus feed on the surroundings to regain health faster and so on, and even receive strength beyond its actual limits by absorbing particles. The whole idea of spiritual bodies does in fact resemble the theory of gravity a lot - the greater the gravity, the better deflection of two bodies. This means that if one body has much weaker spiritual power, it will be absorbed into the stronger body, hence, that body can deal damage to the weaker body while the weaker body cannot deal damage to the greater body.Clearly you didn't read the Chapter today,
This is not the case with Ichigo's human body (yes, gravity still applies with our physical bodies too, but not in the same way as with spiritual bodies). If he takes damage it can be fatal, such as a blow to the head. Whereas in his spirit body he could absorb or to some extent even deflect the blow by concentrating spirit particles on that very area that is being hit, fullbring does not work that way, since fullbring doesn't work with particles, it works with "essences"/souls, not the things they consist of. Meddling with the physical world can have direct unconsidered effects on the physical body. For example, high air pressure can destroy your ear drums. I am not saying Kubo is actually considering these things because he has consequently ignored other things regarding Ichigo's body in the past (i.e. the fact that his body resembles that of a gigai when Ichigo is not in his body, raising the question how it grows and so on), but I am bringing this up because you seem to overlook them.
Yes, Ichigo always becomes stronger when he pushes himself to the limit, but the whole point of my post was that it is very different pushing his physical body and his spiritual body to the extreme. If he dies with his physical body, he is simply screwed. Furthermore, I also think it would be piss poor writing to let Ichigo fight Tsukishima alone at this point. We need to see other sides of Ichigo and him learning that sometimes you must be on the side. It would add a lot of maturity to his character. As much as being in the center is mandatory for the main protagonist, it can be shown in many different ways. I liked the way this new arc presents Ichigo's hidden frustration about his power loss and so on, and the complex dynamics between the characters that suddenly were shown due to this. I would like to see more conflict, but that internal conflict cannot come if Ichigo comes out victorious. He simply shouldn't.
I don't see it that way, and I in fact hope Soul Society will have little to no involvement in this arc as to give room to new characters and their development. Kubo should keep active characters to a minimum, involving Soul Society does not do this.The way I see it, Tsukishima is just a stepping stone to get Ichigo back in business with soul society