I don't think anyone enters any qualifier with the thought of losing.
But I understand what you're saying. It becomes a greater burden financially and in other ways to try and qualify. Thing is, even in the U.S., most guys have to spend a lot anyway in travel to qualify. It is pretty expensive considering this is pool and pool players are not wealthy as a whole. So I have to imagine there is serious desire and serious commitment to trying here. There's no room in there for a defeatist attitude. Here's why -
Figure, to qualify for the Venetian...say you paid $2,000 for 2 qualifiers to get in. Some guys played in 3!. Depending where they were, figure $800 per qualifier as travel expenses. A flight, 3-4 nights, taxi, dining. Everyone shows up at least a day in advance. Maybe the expense is higher or lower depending on location, room rates etc... You might be able to drive to one, or flight tickets vary in cost depending on location.
That's $3,600 spent to qualify. A stay at the Venetian, food, flight etc...should easily run at least $1,300. That's a rough estimate and depends on how long you intend on staying. It was $180ish a night. Minimum stay would be Friday night, Saturday for player's meeting, and Sun and maybe Mon for round 1. If you are out round one, you can leave Tues. That's 4 nights. If you played Sunday and got knocked out, then Monday is best you could leave - saving you a night. Of course, open date plane tickets cost more or buying last minute also raises the price significantly.
If you get knocked out round one. You get $2,000. After taxes, it will be less. You probably spent $5,000 to play in this tournament, and I'm sure it worked out to more than that for most players. Round 2 would be $5,000, before taxes. That's a little better. Round 3 is the make money round, that's $10,000. Also gives you the minimum money amount to have a realistic chance at making top 100.
World Open is $5,000 for round one, but qualifiers are $1,500 each, and more spread out geographically upping the travel cost a bit depending on your situation.
Look at the NAO's qualifier list. Some of those guys played in a lot of qualifiers and the few who made it, some got knocked out round 1. Ouch!
Only other way is to do some serious planning about where to stay, how to get there. Some player's did creative things to minimize costs. Others grouped together to split the costs.