My hamstring doesn't need more glute work. (Does my grip?)

Here's something I don't usually share: I've been dealing with a nagging injury of my own. For the past 6 months, I've had persistent pain at the top of my hamstring - right at the sit bone. High hamstring tendinopathy. Or possibly something pelvic floor-related (the overlap is real). And here's the part that's a little humbling: even with everything I know, my first instinct was to look everywhere except the hamstring. "Is it my glutes? My core? My hip mobility?" I started troubleshooting...