0.1% of annual spending is minuscule.

Wildland Fire Management and the Wildfire Adjustment

The largest share of FS appropriations goes to the WFM account. The WFM appropriation funds preparedness, or fire prevention, detection, equipment and training; wildfire suppression; and salaries and expenses.

Overall, in FY2025, 51% of the agency's discretionary appropriations, including supplemental appropriations, were provided for these two accounts (26% WFM, 25% wildfire adjustment).

https://www.congress.gov/crs-product/IF13101

The point is Trump will never do anything that isn't for deeply personal reasons. And he would never do anything solely to save money on the budget, he doesn't care about that at all. So either he does this out of pure spite, because it is a "liberal" thing, or more likely he does it because he has been bribed by whatever industries are eager to turn all that forest into shortsighted profit.