As I and others have said many times on this site, Streams need advocates. This is especially true in urbanized areas. Make no mistake, the Lack is in a highly populated, commercialized, "urban" corridor. It faces ongoing attacks from a variety of things associated with its location. IMO, that's part of it's beauty....and what makes it ugly.
So, it's not a bad thing that it gets some publicity in a conservation context.
Regarding crowding, access can be a bit challenging. If you know where to park and walk, it's easier. If you use the upper Delaware and spring creek (Center Co.) as analogs, too many anglers can degrade the quality of the fishery. Debate that if you like. As JeffP suggested, too many anglers does degrade the quality of the experience for many of us.
Publicity for the Lack, Big D, Lehigh, Penns, Pine, Susky, etc. (speaking only of the rivers I frequent) is not spot burning like it is for small, fragile tribs. The big waterways are well known. Tribs are, to varying degrees, not as well known. I don't even tell my buddys where I catch big fish. I'll take them there, but that gives me a chance to talk about overexposing a small wild trout stream. I can only hope my trust in sharing "my spots" is well placed.
Hopefully, these distinction makes sense.