I hear you but since JK we have spent high picks on Collins Losman Edwards and traded number ones for Bledsoe, Johnson as well as free agent signings of others.
Out of those last sixteen years and a lot of investment Fitz is the best of the bunch.
The draft is a crapshoot. Would you trade three more years of rebuilding for a fifty percent chance of getting a starting quality QB and a much lower chance of getting an elite one? We have a non elite starter right now. We could do better but we could (and have) do much worse. Tannehill may be the second coming of Marino but statistically he is at least fifty percent likely to wash out over the next few years. Luck and RGIII he is definitely not.
I will take getting this team to competitive right now than continuing the cycle of "maybe the next one will be great"