"This would not be a problem if I were driving a snowplow"

This quote by Aaron Allston implies that the speaker is dealing with a problem that might be easily solved if they were driving a snowplow. This could mean that the speaker is stuck in a difficult situation, such as being stuck in a snowstorm or a traffic jam, and they wish they had the power to clear the method for themselves. It could likewise imply that the speaker is dealing with a difficult task that needs a great deal of effort, and they wish they had the power to plow through it with ease. In either case, the speaker is revealing a desire for a service that would make their present problem much easier to fix. The quote indicates that the speaker is feeling powerless in their current circumstance, and they are wishing for a method to make their problem easier to handle.