Why use a tea kettle?

I only recently started drinking tea and I always just put my mug of water in the microwave for a couple minutes and then add the tea bag. It does the job 🤷‍♀️ plus, it takes me forever to drink a cup, so I end up reheating it in the microwave a few times anyways.

I have thought about getting a kettle, but I'm not sure if I would actually use it. What's the point? How is it different from microwaving it?