As i understand the message of the sutta’s: mind is protected when there is no craving, no grasping at all anymore, i.e. the fires are extinguished, Nibbana.
One can say that a Buddhist aims for cessation of existence, but, i believe, it is exactly the same when one has a feeling for what is already pure in oneself, not defiled, peaceful, cooled, and wants to give room to this and extinguish all incoming defilements. This is like freeing the nobleness in ouselves from the imprisonment, the fetters.
It is not difficult to understand, i feel, that while defilements extinguish nothing will change but suffering will get lost. It is still you thinking, acting, speaking, but now without taken up the burden of the khandha’s. Because it is only because of grasping that we take up this burden of khandha’s, also in this very life.
I feel it is also very heartwarming that in this case one does only aim for ones own welbeing and that of others. That is also the effect of purity.
I do not believe that we have taken up the burden of the khandha’s with our physical birth, but any time a feeling (vedana) arises, for example, and instinctively it is grasped as me, mine, my self, the burden is taken up. It is something that happens in the moment.
The extinguishment of defilement in the mind the Buddha called Nibbana, the not taking up of burden. And the sutta’s talk about it as bliss, peace, coolness, ultimate happiness, the end of suffering. In this sense, it is ‘only’ the craving, the grasping that stands between this experiential ultimate happiness or bliss of Nibbana and our usual burdensome life.
The love for sense pleasures is the love, desire for nice vedana’s. This is called; kindling vedana in the sutta’s. If there is no desire for vedana it is called extinguished, it becomes cool. It does not cause problems, agitation, distress, dispair, nor even gladness when nice etc. The same for other khandha’s.
I believe, many buddhist connect to the Three Jewels not from a wish to finally have a last death and cease forever to exist, but recognising the sphere of purity in the Buddha, the Dhamma, the Sangha and also in themselves. This is like recognising Nibbana because this sphere of purity IS Nibbana. The sutta’s are very clear about this. The Path of the Buddha is a Path to purity and this is Nibbana.
But ofcourse it is all not easy. Craving is such a huge part of our lives and we have seen this craving for so long as a Path to end our suffering. Always making it still stronger while choosing to follow the cravings. At least in this life we can make more wise choices. For myself i see this as good enough.