Your analysis is woefully incomplete and subject to a very high amount of subjectivity.
For example, you lable a WR as a "bust" who averaged 50 catches per season over a 10 year career, yet you label an OT a "boom" who essentially had a 6 year career and didn't start much.
Assuming that your "boom" and "bust" labels were correct (and they most certainly are not), the analysis is incomplete. To determine whether it is wise to draft a WR you would have to analyze the contributions of the "boom" WRs vs. the contributions of the "boom" OTs (or any other position). For example, say you valued, on a scale of 1 to 10, the contributions of all the "boom" WRs as 8 on average, but the "boom" OTs had a contribution level of 5 on average. If WRs had a 50% bust rate, and OTs had a 33% bust rate, the expected return on a WR would be a 4 contribution and the expected return of a lineman would be a 3 contribution. Thus, it would be a better investment to draft a WR. Of course, all of these numbers are very subjective, so you would have to do a great deal of mathematical justification for you analysis.
In the end, your post isn't very informative at all.
I suggest you study the term "expected return" rather than just the term "risk."