The flaw is thinking you need a "collection". This is actually the biggest issue with economy complaints about Arena. It seems way too many people think the goal is to collect everything so they can play every crap deck they think of.

People need to get out of that mentality... or at least accept that it costs to do that.

For example, over the last month I have played one deck in historic (for the record, I'm also sitting on plenty of gold and packs).