Thanks. It's again the DfT which refuses any rail improvement measures in London because they think that adding additional calls into the long distance trains will drive away passengers without considering that the rail service is more attractive by giving direct access to more destinations.
Those long distance trains into Kent don't call in inner London, with first station usually Bromley South.
Why do you think more people benefit by not having trains which allow people to get to more useful destinations while paying a cheaper non-Zone 1 fare?
In my experience, the DfT has it more right than you here. When you're travelling 50+ miles, on a journey that may take more than an hour, you don't want to start calling at random South East London stations "just in case" someone wants to use them. I'd estimate the number of passengers desiring a direct link from, say, Canterbury to Penge East to be somewhere in the region of zero, whilst those travelling in reverse would be happy to change, cross-platform if memory serves correct, at Bromley South.
From my station, there are three trains an hour to Victoria. One nearly all stops to Bromley South (not Bickley), then Denmark Hill and London Victoria. One is semi-fast to Bromley, then direct to London Victoria. One is fast to Bromley, then Victoria. Perhaps you'd care to guess which is the least popular? South East London is not a top destination for most people travelling outside of London, and there are good reasons why Denmark Hill is the chosen station.
Similarly, why do you think lots of commuters like to get the non-stop services to Bromley South, rather than the all-stops service, even though the all-stops in theory gives them "useful destinations"?