You need to pay money to people who will put in effort and agency. You can't just throw money at random people and expect something useful to happen. Sometimes, the people who will make things happen if you throw money to them don't exist. Sometimes, you have to turn people into those people (which also costs money).

Money is something you give people so they can eat and stay warm while they do the thing you want. They still have to be doing the thing you want. Sometimes there's enough reputation and legal threats on the line that you can assume the person will do the thing just based on the fact they're taking money from you and not freaking out. Companies do things this way a lot - individuals not as much.

The abstraction is not the territory, and the idea that money denominates value is an abstraction... often we define "value" as "that for which money is exchanged", making the abstraction tautological, at no gain. This is often done by people who want to think the thing they're spending a lot of money on is very valuable, or want to make you think the thing you're spending a lot of money on is very valuable.