ok these are all the instances of a cursed spirit biting the big one and you might notice something, with the exeption of these 4 instances
(hazanoki the bomb boy himself sets of a massive explosion killing multiple spirits)
(maki killing a bunch of spirits in a tunnel and rushing out of it)
(choso killing a bunch of spirits with piercing blood while yuji is rushing out of the tunnel)
(choso setting of a supernova in front of a bunch of spirits)
cursed spirits die and slowly fizzle out of existence, they don't explode or violently erupt they slowly turn to smoke and there is a little line of similarity between these 4 exeptions as well and what are they you ask? well 2 of them are literally caused by someone setting off an explosion themselves (supernova and hazanoki using his body part bombs) or we have a bunch of cursed spirits killed in a confined space with the tunnel exits or vents acting as a funnel from which the smoke created by the passing of the spirits is pushed out through the force applied to it by something moving increadibly quickly be it yuji with the conjunction of choso's piercing blood or maki just quickly existing the tunnel meaning that we have a bunch of smoke focused under a ton of pressure in a single point so of course it would look like an explosion
So KE calc fully applies to yuji's and rika's feat as we see here:
and here:
the curses are all above the city sky line meaning there is no funnel point meaning that the massive fuсk off blast was caused by yuji's dismantle having enough energy to just send off all that smoke into the stratosphere same goes for rika doing it
and before anyone trys something like "oh its an art style change" card:
no
it isn't