Actually, I have to disagree with you…
The Gold to Cash transfer is actually an awful deal, even if it’s to use on your best heroes.
Higher leveled players/heroes require higher amounts of cash, and $37,000 bucks is quite minuscule when taken into consideration the amount we need to even upgrade 1 skill point… definitely not worth 10+ gold in my opinion.
Other than that I agree with you completely 
Below is a little overview of the amount of bucks we require in-game to max out stars and skills for each hero, not including the bucks we need to craft all the items they require to rank up.
For every new hero they add to the game, this total runs up, yet no new methods of obtaining bucks are set into place.
Time for more bucks 