The draft is about risk and high end talent. Sure, there is always the out of nowhere pick like Mike Piazza who gets drafted late and goes on to become a HoF. But that's extremely rare, playing very long odds.
The whole idea about skipping a player that you really want because his cost will mean pinching pennies later in the draft is a little weird to me.
The odds are that your impact ML players mostly (by a big margin on a % basis) come from 1 and 2 round picks. Most often, anyone not picked that high turns into a bit player at the ML level if at all. Sure, you get a lot of 4,5 and 6 round guys who bang around the upper minors for a number of years, might get a cup of coffee and certainly help the real talent out by being somewhat competent teammates. But, being overly concerned that you will miss on a real star after the first couple of rounds of the draft is a bit like worrying what you will look like when a super model comes to ask you out. So you say it could happen.
I think if you can get high end talent with 1/2 in the draft and it means that you punt rounds 4+, then so be it. You can always populate the lower minors with guys looking for a second chance from getting cut with other organizations and with cheap college seniors. If you could get Gorman and Hankins and nothing else, your talking about two guys who have at times been projected to go 1/1. Neither may ever amount to anything. But both have certain tools that are being graded at future ML star level. If both make it to the ML (or even one who becomes a star) who cares that your 4th round pick was a blind midget with a club foot?