Not Enough Departures
The ATC Handbook, FAA Order 7110.65, Paragraph 4-2-8 directs controllers to ask this of VFR aircraft seeking an IFR clearance in the air until they reach the minimum IFR altitude (MIA), typically, ATCs minimum vectoring altitude or the published MEA. If the pilot is able to maintain terrain and obstruction separation, the Handbook states, issue the appropriate clearance… If unable to maintain terrain and obstruction separation, instruct the pilot to maintain VFR and to state intentions.