That’s because, as Tim Carney explains in this Washington Examiner piece, lobbying sometimes defeats other lobbying, leaving taxpayers with one less needless subsidy to pay for.
Alas, such counter-lobbying doesn’t always work but more importantly, the resources wasted in the whole game of seeking government favors and trying to defeat such favor seeking is huge. The people hired to do all that unproductive work would otherwise be doing something useful.