You don’t have to get a cellular connected watch. My Samsung operates off wifi and Bluetooth only.
While I wouldn’t say they’ll revolutionize your life, they are useful for telling time, notifications, navigation, step tracking, exercise tracking, sleep tracking, controlling music, etc. If you find a good deal on one you might try it out. My battery lasted about 3 days new and is down to about 2 days now but I’ve already bought a replacement battery which looks easy enough to swap.