Here are the passages containing the problematic phrase 'so much as'.
1. "Not all thoughts can be realized and not all desires are fulfilled. The reason for this is not the content of a person's thoughts so much as their quality."
Content is not the reason. Is quality also not the reason or is it the reason?
2. "It is not the model itself that has meaning so much as what it can help you to achieve."
What does the 'so much as what it can help you to achieve' mean? Does it mean 'what it can help you to achieve' doesn't have a meaning too or does it have meaning?
Comparisons can be taken to extremes in which the lesser action or item is in fact zero or a non-event. I suggest this is where the confusion lies. The context is the key.