Does mindfulness end kamma ? is that a good thing ?

Does mindfulness end kamma ? is that a good thing ? !!! yes I am aware that the goal is not to attach to anything so avoiding suffering and that good kamma in the end is also "bad" !!! I am asking about whats the benifits of mindfulness eradicating kamma becaus : Dont we all have a ton of kamma from a gigantic amount of kamma and if we eradicate kammas throw mindfulness it will just be replaced with other kammas which can also be bad kammas ? i mean its not like we reach nibana by cleaning up all the kamma "We" got - but by developing wisdom so whats the good thing about mindfulness ending *spesific* (not all) kammas ? I ask this after receiving this reply (and wanted this as a follow up different question) : "Right mindfulness is an intentional (mental) act therefore it is kamma. However it falls under a 3rd type of kamma that is called the "kamma that ends kamma". " from here (I wanted this as a follow up in different new question) : https://buddhism.stackexchange.com/questions/18689/is-mindfulness-itself-kamma-does-it-create-kamma