Considering your bona fides, I read your "..take on this stuff." with some interest. With all due respect, your "take" can fairly be summed up as, "Don't waste your money on new/better cables, components, etc. Instead, buy room treatments, which, incidentally, are available from a company which pays me handsomely for my design contributions."
Clearly room acoustics is a powerful factor to be dealt with in tuning one's home audio system, but you've been around long enough to know that it's not the only significant one.
Fear not, most of us are really vulnerable to tweaking urges and we aren't likely to leave your firm's products out of our considerations.