This is an old myth. The parks division and the wildlife division operate on two separate budgets/funds and money they generate goes to their own funds. When you buy a parks pass that money goes to the parks budget/fund, when you buy a hunting license that money goes to the wildlife budget/fund. The only thing they share is administrative office space and staff such as HR, IT / website. You can find all of the operating budget info online.
Only 3% of the revenue that is raised by both departments is shared to fund those administrative expenses that are shared by both.
https://cpw.state.co.us/aboutus/Pages/Funding.aspx#:~:text=CPW%20employs%20a%20user%2Dpays,the%20majority%20of%20CPW's%20proceeds.
Sure is strange how Parks suddenly became flush after joining the Wildlife side - like within 2 years