yes but 500RO is extremely limiting for every other specialization - i've been able to use cargoships for almost all my routes and still spam off a very sizable conquest fleets
freighters don't really offer much benefit in my book. you're better off setting up a new colony if your looking at harvest from 24 spaces away unless you are planning on stashing all your RO on one planet

- and when you can oneshot mining colonies (with a very limited number of bc - sorry, not giving up a magic number =p )... you can resource starve everyone within a few galaxies of you if you put in enough time