The last song I wrote (and one I consider to be as good if not better than anything I've ever writte) took three weeks--a rough estimate is about 120 hours from the initial idea and some chords to a finished product. The people who have heard it seem to like it. They range in age from 14 to 60. In my younger days I likely would have settled for something less and maybe it wouldn't have mattered all that much. Who knows. However, I do know that songwriting is hard work. It always has been. There are no short cuts, no easy ways, and no tricks. Just hard work. If songwriters are not willing to put in the work, it is likely they will produce a product which they will eventually wish they hadn't. That too is from experience.

The performing aspect: songs take time to learn well--to get phrasings just so, chordings just so, slides, riffs just so. If performers are not willing to do the work to seek and occasionally realize 'perfection', then find another way to make your livelihood. The same with the vocal side of things. It's work--nothing more, nothing less.