Palm reinforcement is one of the most practical features you can get on ski gloves, especially if you ski frequently. The palm is the highest-wear area on any glove—it's constantly rubbing against your pole grips, and if you ever use rope tows, that friction will shred an unreinforced palm in no time. An extra layer there can add seasons to the life of your gloves.
That said, there's a small trade-off. The added material can slightly reduce dexterity, so tasks like adjusting zippers or fiddling with boot buckles may feel a bit less precise. If you're a casual skier who only gets out a few days a season, you might prefer the cleaner feel of an unreinforced palm. But for regular skiers, racers, or anyone who grips poles hard all day, palm reinforcement pays for itself by preventing premature blowouts in the area that wears out first.