We are "saying" anything, since "we" are just users like you. You have three choices for backing up your new $1000 phone. You can back it up to iTunes by hooking it up to iTunes on the computer you sync with, or you can pay .99 cents a month to expand your iCloud memory to 50 GB - a size that reasonably can be expected to be large enough for a backup for your new device.
Or, you could always just not back up at all (or only back up a couple of things).
GB