My take -
The connection ought to be with.., is with.. - The Soul/Spirit (i.e. inside, i.e. closed eyes not sleeping and digging within/inside).
Hence, upon conclusion, even if the body is left as is.. it is irrevocable, irreversible and untenable that the body will a hundred percent automatically/gradually disintegrate and becomes one with The Universal Dust
N.B. - The only unforgivable and eternal sin is the blasphemy against the Spirit. It is my rational conclusion that the claim that there is absolutely no Spirit/Soul in alive/breathing human bodies, is the apex most blasphemy against the Spirit that can be. [When Musk Elon claimed that most of us humans beings will be in Hell (provided there is sucha plane/place) unfortunately he wasn't off the mark substantially tbrh because modern education, capitalism setup, pyramid slavery scheme on the planet doesn't even talks about the idea of the presence of TheCreator's essense, the Soul/Spirit within, doesn't talks about digging 'within' onto alive human beings.. doesn't wishes that such a real observational fact, that life is a temporary transient dream, should even hover inside the minds of all us gullible human beings - because such thought in alive human minds will definitely struck and break their matrix that they(elites) work each day tirelessly to build and hence would struck the enslavement pyramid as well, eventually! But no, they wish that human beings during their entire 80~100years of lifetime keep believing the life to be the only real and keep the soul/spirt present within, on the ignore].
Human body is made out of dust will become dust nevertheless. But, equally, there is more to all our alive human body, individually, than just the finite/matter.
The question begets, are we, individually, able to even see past other individuals' language, gender, nationality, culture, skin colour, age, religion, et. al. distinctions? From my experience, it is difficult, but not entirely impossible.
Lol. The above post might seem disconnected and incoherent, but I promise, should you (the reader) were in my shoes, you would be able to experience the interconnectedness of The All Matter and TheSource Of All Matter (from your internal eyes).
tl;dr -
The cremation assists in The Universal Design, thats all. Cremation is like a logical 'fast forward' to what The Universe will do by its own, gradually anyway. The buried bodies gradually decompose in totality, eventually.