Steer by wire is cheaper to produce, as it allows you to reduce costs for RHD markets (e.g. Australia, New Zealand, UK, Thailand, Indonesia, Japan, etc).

For example, Ford F-150 and RAM 1500 trucks from the US are exported to Australia where they need to undergo an expensive conversion process before they can be sold. This is why a base model F-150 is US$74000 in Australia.