Funny how it only seems expensive until you try it.
Then it's more like "wow, I can't believe I wasted so much time on a junk iron".
Of course any iron with enough wattage and a proper iron clad tip will provide good service, unlike a $10 piece with an unclad copper rod for a tip. But after the bare essentials are met, things like ergonomics start to matter.
Most people new to soldering base their opinion on trying to solder to the unplated radioshack proto board (usually not very clean), with the accompanying $7-$10 iron, and some 60/40 solder. It's challenging to say the least!
Contrast that with a truly clean board, or a tinned board, some 63/37 eutectic solder, and a reasonable iron with a tinned iron tip, and all of the sudden, it's not that difficult to make a solid, shiny connection. But most first-timers are going to go with the low investment until they decide if this is for them.
Unfortunately, many are so put off by trying to solder with poor equipment that they never stick with it.