There was something so visceral about prime ECW that made it feel real to it's audience, and this is a good example of that. It's almost as if Tommy Dreamer somehow convinced himself that harm was actually being inflicted on his girlfriend.
He's not employed by WWE anymore, it doesn't appear TNA, ROH, or NJ are exactly knocking down his door to employ him. House of Hardcore is probably his best option he has for making steady money while continuing to do what he loves. He's not known for being an inring technician or, slightly more obviously, a high flyer, or any style like that. He's known for being an ECW vet, a "Hardcore Legend", whatever you want to call it, and he still attracts fans because of that.
I wouldn't call that "not letting ECW go" as much as I would knowing what his market is and capitalizing on that market.