Moderate moisture wicking can work fine, but only for the right situation. If you're a casual skier who sticks to groomed runs, skis at a relaxed pace, or spends more time sitting on the lift than charging hard, moderate wicking base layers are usually adequate—especially on cold, dry days when you're not sweating much.
The trade-off is that moderate wicking is slower to dry and less efficient at moving sweat away from your skin. If you start pushing harder—like skiing moguls, hiking to fresh lines, or just running hot—you'll likely notice dampness building up. That moisture can chill you fast once you stop moving, like on a long lift ride back up.
If you tend to run warm, ski aggressively, or mix in backcountry touring, step up to good or excellent wicking. But for mellow resort days in cold weather, moderate wicking is a reasonable choice that can save you some money.