@jac I personally think this is a good idea. The hardest part is traction. Whilst the concept you have is pretty unique in the sense that nobody else is doing it, as you know there are a wealth of other sites offering a hub for similar information. You just need to find the competitive edge that will compel users to return on a frequent basis.
Often this is in the form of content they can’t get anywhere else. Whilst it’s all well and good having feeds from other sites, etc, your own content, or your own unique insight into a field of expertise or knowledge can place you above the crowd and make you stand out.
It’s the old adage of “content is king”, and given how popular the chosen field is, getting fresh content out there isn’t going to be easy - particularly given the plethora of available information sources these days.