The station is not in central Cambridge it is in an out of town location
Cambridge doesn't have one centre any more, it is a multi-nodal city. It is only shoppers and tourists that want to get to and from the old town centre. The Biomedical Campus, with more than 20k employees, plus lots of hospital visitors, is one of those nodes.
The station is in an out of town location, thus the "valuable narrow street space" argument is not relevant.
The narrow street space is relevant because the main routes in and out of Cambridge are also narrow street space. For the Biomedical Campus that's Hills Road/Babraham Road and Trumpington Road/Shelford Road. If you want to see how congested they get, then look at the Stagecoach bus timetables and see how long they take to cover very short distances.
How many stations, particularly newly opened ones on "out of town" brownfield sites, have no car park ?
The Biomedical Campus is not a brown field site, it is a green belt site. This statement demonstrates your ignorance and prejudice regarding the Biomedical Campus.
20 years ago Cambridge South and its surrounding land was agricultural fields, the only access was Red Cross Lane, an unmetalled farm track.
I will avoid diverting this thread into the political area of what is authoritarian and confine myself to saying I think it is authoritarian.
It isn't authoritarian, it is democratic. I grew up in Cambridge, compared with when I was a child, the City is 50% bigger, but with almost no increase in road space since our bypasses were constructed in the 1970s. Most of that growth has been in the last 20 years, when Cambridge has had increased traffic congestion and sacrificed lots of green belt land, including what is now the Biomedical Campus. Until now, local democracy has decided, mainly through the planning system, that cars will be discouraged and cycles encouraged, in order to deliver economic growth without sacrificing the essence of what Cambridge is.
If you don't like it, don't come. And that will be your choice. But businesses are voting with their feet, and coming to Cambridge, even if you are not.