A win would do a lot more for Anderson's legacy than Bones because of the age and size difference. If Bones won it would get downplayed historically and the conversation would turn into what would happen if these two could have met in their prime. If Anderson wins it becomes another ridiculous accomplishment towards the end of his career making it even more impressive.
I don't really think it makes sense for the GOAT to be chasing fights. Shouldn't people be coming to him to get their own glory like Rashad is thinking about doing?