Are you saying that the temperature of the water when it hit the ground beans that matter or the fact that the water was brought up to a boil or 100°C?
It's not so much work with the right tool: I have a button on my kettle that does exactly that, and another button that will use a little thermostat to keep it warm. Works great.
https://www.sageappliances.com/en-gb/product/bke825?sku=SKE8...