Yes lift tickets are expensive and they are forcing you to get into the season passes.
However:
-Many skiers today have 2+ sets of skis (etc one for powder one for carve) with some die hards having 6+ (Cost: $1500-$3000). Ski equipment, is just like any other commodity and don't last forever. Eventually they would have to be replaced and the industry average is around 7 years.
-Skiing specific clothing. Most people have 1-2+ skiing specific jacket that isn't really worn anywhere else. Waterproof, pass pocket, snow waist trap etc. As well, snowpants, thermal socks, gloves, etc (Cost: $300-$1200)
-Ski helmet $50-$150
-Ski Goggles. High end ski goggles can go upwards of $250. Cost: $50-$250
-Ski wax and tuning each year ($50 per set)
-Cargo roof: More and more people spend upwards of $1000 for those Thule cargo systems
-Gas costs: Depending on where you live, it costs anywhere from $15-$40 (1hr-3hr) per day trip to your local resort. If you go 20x, thats $300-$800
-Winter Tires: Depending on where you live, you would have to get winter tires that you otherwise wouldn't have bought. Cost $1000+
-Ski Vacation: Not going to estimate this but definitely in the $3000+ and even $10,000 for a family of 4
As you can see, we have quite a few costs beyond the price of a pass/lift ticket yet the majority of the discussion about costs are aimed at ski resorts...
I have yet to see anyone lament paying $300 to tune their 6 sets of ski gear...