Just because an exercise looks weird doesn’t mean it’s bad. (Barbell hip thrusts, for example, look like something you should never do in a gym.) In this case, however, the seated abductor and adductor machine is both weird and bad. By forcing your legs to open and close, you put a lot of stress on your hip capsules and IT bands. A better way to strengthen your abductors and adductors is to stand on one leg: not only are you activating those muscles to keep your leg stable, but you’re also activating your core.
Use these instead:
Single-leg Romanian deadlift