Players requested that such roadblocks be up front so that people don't get so close to the end and then realize they're missing a hard-to-come-by ingredient. They felt trapped. If you don't have two nuggets on hand or the resources that provide them now, you likely won't make it through and better to figure that out now than after sleepless nights.
The first year or so of this game I could never finish events, or I had to spend a ton of gems to be able to. That's par for the course. Maybe it'd be worth them looking at a model of making the events more accessible, but I think that for now, they are geared for advanced players.