Is it possible to adjust pitch bend using an other feature than the drawing tool. It is difficult to hit zero…
I know what you mean (and sympathise 
).
The best I can come up with, is to draw the event anyways, select the node(s) that should be at center position, then use the following Logical Editor setting (Save it as a Preset, that you can then evoke with a key command)…
Upper Section…
Type is___Equal___Pitchbend___And
Property___Property is set___Event is selected
Lower Section.
Value 2___Set to fixed value___64
Function = “Transform”.