I know i said i wouldn't reply, but this is info i don't think a lot of people really understand unless they've rolled a mile in my chair, so to speak :) So replying to you, but hopeful it teaches other readers a few points.
The public transport system not being fit for purpose is only half the issue for some disabled people. Yes it would be vastly better if it ran on time, there were more bus stops, we had the support at train stations to get on/off trains, and there was better access to wheechair spaces on buses, or Taxis were more accessible/cheaper to use... but those are not the only reasons disabled folk feel they can't use them.
In my case its unusable for several reasons. First i have to consider what service i'm using, and how to GET there. I could take my wheelchair to the bus stop, but then i have to pray that there are no hills or uneven terrain between there and my house, because my wheelchair is self propelled, and it takes a lot of energy to wheel on surfaces that aren't flat.
Then i have to hope the bus has a free chair space. I could get on and fold, but then i need my crutches, which means needing to also bring those attached to my chair, along with myself, and my bag.
Then i have to hope there is a bus stop near my destination, again that the terrain is wheelable upon. Then i have to reconsider the same on the way home, and hope my finite energy levels will last me that long, but potentially, it's going to take me out for the next 3-5 days.
I could take my crutches and walk to the bus stop, or train station, but again, i have to hope there is a seat, that my pain levels will last for that walk/journey/and back again.
Taxis-- well, i won't discuss those because you'd need to live where i live, where the taxis are not a safe form of transport for single females, never mind disabled ones.. means i have to prebook with our local womens run Taxi service which is very overbooked and near impossible to get without booking a week or so in advance.
Or.. i could skip all that and drive myself.
Public Transport isn't just a matter of accessible, its also about the trials of getting TO said PT, and home again.
And yes i did see you said about diverting money to make more options available. I used to work for one of the big convention centers as a volunteer for events planning, one of our jobs was to arrange a taxi/shuttle bus service for our disabled attendees from the hotels to the Convention Centre and back, i also have a close friend who owns and runs a Shuttle Bus company in London for the Special Schools, and i can assure you, it isn't that cheap, or that simple as just creating another service with a bit of extra funding.