the hot water can damage the water softener in your dishwasher

Most dishwashers in the US don't come with water softeners. AFAIK European made American market Bosch 500/700 series ones do, but the American made ones do not. Both would be designed for connection to a hot water supply.

As heated air drying (in the US) has fallen out of favor, hot rinse water will help things dry faster. To that end my Bosch dishwasher has an option to increase the temperature of the rinse water.