People like to refer to football as a business, and these days it is. So let me put it to you another way.
Ben Hunt has been in the Broncos system for 8 years. They would've spent upwards of $750K, probably over a $1 million on his scholarships, contracts, development time, travel, coaching etc etc.
Tim Smith has been in the Broncos system 6 months. They would've spent $50K on him, maybe, in terms of all the training, coaching, travel etc.
Losing Tim Smith means the Broncos lose bugger all investment. Losing Ben Hunt, they lose 8 years and a shit load of money invested in his development for some other club to benefit from.