You're way out of touch with the lightsaber community. You probably are not even aware of it. Our lightsabers have been doing this plus many many more features as well for many years. The hilts are not chonky.

Disney Legacy Lightsabers use extremely dated tech. It's the cheapest and lowest quality saber on the market. They are for people who must have a license attached to the product or just want something looking nice on their shelf and don't care about accuracy or the extra features and blade brightness.

Custom built lightsabers that are way more accurate to the props can be found at the same price as a Legacy Lightsaber. They are all not super expensive. It's all in what you want out of the saber.