That's an incredibly cynical take. As a hiring manager, I want to stack my team with the best employees we can convince to join our company. Obviously, throwing more money at the candidate is the easiest way to convince someone to come on board.
However, the company doesn't have infinite money to pay candidates. Compensation comes out of our budgets. The more we pay each person, the fewer people we can hire overall. This is fine if you're really hiring someone with above-average productivity at above-average compensation, but it becomes a problem if you're paying above-average rates for average productivity.
Higher compensation cuts both ways, though. If an average candidate is demanding above-average pay, why would I go through all the work of getting authorization for higher pay just to hire an average candidate? If I'm going through the trouble of getting approval to increase the pay for an open job position, you can bet I'm going to search for higher performing candidates to match that higher compensation.
Usually, when a junior candidate starts requesting senior level compensation, I just give up and hire a senior candidate instead.
Also, higher compensation comes with higher expectations. Businesses have ups and downs and layoffs are a fact of doing business. When budgets shrink and headcount must be reduced, the first people to go are those with relatively high compensation for their productivity/skill level.
But no, it's not simply about having a "win" over the candidate or making power moves during the hiring process. You have to think of hiring as company vs. the entire candidate pool, not just yourself vs. the hiring manager.