Resources are resources. The USAF has been trying to retire A-10s for years, with the stated purpose of using those resources (money included) elsewhere.
Resources that could include allocations for new purchases or upgrading other 4th Gen fighters, missiles, etc.

an article from a source self-admittedly biased towards the A-10:
https://taskandpurpose.com/news/air-...ers-reduction/

the USAF was blocked from retiring A-10s that it wanted to in 2015, 2016, 2017, 2021, and 2022
https://taskandpurpose.com/news/air-force-a-10-warthog-retirement/
“With its efforts to retire the A-10 fleet stymied by Congress, the Air Force has invested $880 million to keep the aircraft flying into the next decade.”

Retired Air Force Lt. Gen. David Deptula, dean of The Mitchell Institute, praised lawmakers for allowing the Air Force to finally divest some A-10s, which will allow the service to train more maintainers for the F-35 and other newer aircraft.

“The fact of the matter is that the A-10 has been a magnificent airplane in the over 50 years that it’s been around,” Deptula told Task & Purpose on Monday. “But, when you look at the decline in the force structure of the Air Force and the demands of our National Security Strategy to increasing threats that are opposed against the United States, we need to move on beyond the old capabilities that have been useful in permissive airspace but will not be very useful in contested airspace.”

I’m wondering what makes me an idiot? I’m pretty sure that this has been the USAF’s argument for a decade or more.