what michael went through is insane to do on your own, i mean most people have company to help them with basic tasks even after basic surgeries. and very often that help is VERY necessary, dude got disembowled. sure, he isnt alive anymore but he still has to deal with drainage, cleaning himself out, making sure he doesnt fall apart, etc. remnant already does enough, it'd be boring if it were a magical cure-all that somehow deletes all those adversities. it is totally somewhat(…) plausible that he could do all that alone i would imagine he had gone over the thought of reaching out to someone, counting the very limited amount of people he had, mostly made up of superficial surface level acquaintances, over and over again before reaching to the painful conclusion that showing up to someone as what is essentially a zombie, a rotting corpse, would cause damage to them he would never be able to repair or make up for. and he couldnt deal with causing damage to someone elses life, being a disturbance, not again.