Earlier quoted context omitted.
"Extinguish" assumes they have no intention to replace third-party data harvesters with their own service. Apple currently redirects their platforms' weather data HTTP requests to third-party services like Weather.com, that are known for aggressively marketing and reselling user data as a primary revenue stream. Seems more likely they see this as a way to improve weather data for their customers without seeing their…
They could just get the weather data directly from the national bodies that provide it. It's not like they were hurting for money to staff their own weather division.
To your point, it looks like they just spent their money to staff a weather division.