It’s Bucks, Montgomery, and Delaware Counties that will suffer the most from this.
SEPTA was formed by the state, and its existence benefits the whole state by enabling economic activity (which then leads to more state-level taxes), reducing congestion on roadways maintained by the state, etc. And if my back-of-the-envelope math is correct, nearly 1/3rd of PA's population lives in counties served by SEPTA.
When a transit agency serves the state's largest population center and economic center, it seems reasonable for its funding to be a state-level concern. Especially when it also serves other states, and additionally ~40% of the tracks used by SEPTA are owned by Amtrak, which is Federal. County-level officials are just not the best layer to interface with all that.