Hello @VermillionWorks rmillion!
Through All of my studies, both on art and the people who make it, I found that one thing is true. "Do what you have to do."
Shortcuts are seen all around in the professional field if you know how to look for it. Do you dig Anime? Guess what, it's chalked filled with shortcuts. Do you love classic Disney? Shortcuts! Love character design for movies? SHORT-to-the-CUTS!
This is the thing. When you use these programs to help you with creating, you are doing what pros do. Being effective. Now you can actually learn the subject that you are struggling with by incorporating your programs, JUST keep in mind the ACTIVE studying techniques.
Meaning ASK yourself during/after you have finished tracing or whatnot, "Why does this work?" TRY to break it down the subject through: shapes, perspective, color, detail etc. Figure out what's appealing to you.
In doing this you serve both your MUSCLE MEMORY [Drawing is pretty much that --muscle memory.] and your ANALYTICAL side. [With out developing the analytical part of our creative brains we may never grow as artists.]
In closing: DO use the tools available to you. DON'T let those tools RULE you.
You are the artist, the creator. You only use these tools for STUDY and IMPROVEMENT [even when you use them for your comic's Background.]
The FASTEST way to become a slave to these shortcuts is allowing them to alter your vision [i.e. Oh I wanted the building to look a certain way but there isn't a pre-existing model for it...oh well I'll just use this one.] You definitely don't want that.
If you keep in mind that what you are doing when using these programs is that you are PRACTICING with a PURPOSE in time you may find that the tools are no longer really needed and if you had, to you could do with out them.
Don't let anything stop you from your vision. Do what you have to do.
Sorry if the post is too long, haha! But that's my two cents.
Take care now!
-Nelson