Will is intangible and entails motivating and inspiring the feelings of people so that they give off their best at the workplace.
Resources or profits on the other hand is easier to measure , tangible and relates to the financial metrics that contribute to the health of an organization.
Focusing on Resources leads to benefits in the short term and hence finite minded short sighted leaders sacrifice people for resources to show profitability to shareholders.
The harder aspect wherein focus on people leads to satisfied customers and hence profits is not something for the faint hearted. This is why the true visionaries focus on this for realization of long term benefits and the benefit of the entire ecosystem.
Adopted from Simon Sinek’s book The Infinite Game