At $14M you see more prospects, so you are bound to see a bunch of crap. But the odds are you are also going to see more of the top prospects.
As far as it being a waste, it can be. If you're spending $14M plus $20M for a prospect, it could be better to spend that $34M on FA. But if you're not getting any Internationals, you are going to have to rely solely on the draft to build your franchise. So you'll probably need to spend more in those areas.
And at the same time, you control the international for essentially 7+ seasons, most of which will be under cost. The first four years are at league minimum, so if the player would be worth $8M in Free Agency, you're actually not spending any more money than you would be on a Free Agent.
It's a money management game as much as anything else, and you just have to find what balance works best for you within your league.