“Don’t need one.”
“Too much hassle.”
“Just boil a regular kettle, let the water cool down, and you have the same temperature.”
These are the standard excuses for not investing in a kettle with variable temperature control.
Do you need a toaster, juicer, or microwave?
Not really. You can roast your bread in the oven, squeeze your fruits by hand and heat food in a pot.
What makes all the above devices essential is that they do the job quicker, more convenient and with much better results.
The same goes for a programmable water kettle.