You can absolutely skip the membrane if you primarily ski in dry, cold climates where snow stays powdery and wet hands aren't really a concern. Gloves without a waterproof membrane are the most breathable option, so your hands stay comfortable and dry from the inside out—especially during high-output activities like touring or hiking the park.
They're also a smart pick for spring skiing when temperatures are milder and you're shedding layers, or as liner gloves worn under a waterproof shell. Plus, skipping the membrane typically saves you money.
The catch is straightforward: no membrane means no waterproof guarantee. If you encounter wet snow, rain, or slush, moisture will eventually soak through. If you ski in variable conditions or coastal mountains known for wet weather, a membrane is worth the investment. But for cold, dry resorts or short sessions in predictable weather, membrane-free gloves keep things simple and comfortable.