I'm pretty sure this misses the point. The point is that not everyone is well equipped to handle this kind of request and there's little point to holding up something as an example to follow if it doesn't fit that person's situation.Geez, you make it sound like being asked to play a country song as a last-minute addition is the equivalent to being ordered to pull the lever on a gallows.
It's not being "pushed around" ...and there are lots of things musicians in a band can do to see this kind of thing coming. I understand that there are folks who just play bass in a band, sip a few beers and get out, but some of us actually prepare for stuff - even when it's just a fun gathering, because we like working on our craft.
Nobody is virtue signalling. We're just giving examples of how we fit into our music projects.
I'm a big believer in the concept that people should feel empowered to stand up for themselves as appropriate. I'm not a big believer in telling people I know what's appropriate for them, or what they should do. If the OP feels like this was a request he wasn't prepared to respond to, then that's fine by me, regardless of whether I personally could have done it or not.