to answer the question in title with a rhetorical question: does the song's composition matter? Yes! Instrumental and sound quality is half of music, composition is the other half.
but before i could even finish my thought, the rest of your post echos my line of thinking.
a 20$ book that will expand your knowledge is a hundred times more important than 2000$ worth of high quality plugins and libraries (considering what can be gathered for free).
knowledge, ideas, skills, creativity >>>>>>>> quality tools, and you can't really purchase the latter.
sorry to end with a cliche, but it's completely true, there's no such thing as a professional equipment, only a professional user/creator.
SimplyRobot
Yes.
gridcrawler
Everyone has their opinion. But a fully written opinion is a good opinion.