This thread is not about whether you are forced to buy it, it's about there being a point to buying it, and such comments do not constructively add to this discussion. For example, you aren't forced to buy cap8 armour either, but people do, because there is a tangible benefit.
The stats are obviously not fine, as evidence by a combination of common sense and the fact the jintsuriki is almost never used, and so this is about making a useless piece of equipment useful. A money sink that nobody buys, because it's pointless, is no money sink at all.
An expensive piece of equipment that gives you a bit of a bonus without offending balance, on the other hand, is a money sink. For example, the minified spyglass scanner. The jintsuriki might as well not even be in the game in its current state, so giving it the minified spyglass stats is surely a constructive change that adds effectively unused content to the game as a money sink.