Besides the studios trying to make money, who are these live adaptations really for?

The anime/cartoons (regarding this topic specifically and other cartoon adaptations to live action) still stand the test of time for the most part, give or take perhaps the definition/resolution of the work and some writing that may not have aged well. Seems like it would be cheaper and possibly as profitable to remaster the old works and do another marketing push of them, reshowing them in theatres and then doing a new print of the remastered work.