Looking at Google Earth I think you're probably right, unfortunately the "Streetview" cameras seem to have missed quite a lot. . It's odd really, my wife and I went to a pub for lunch today and, checking it out on "Streetview" before we went, it would appear they drove straight into and round the car-park at the back of the pub!
There's a road (Ashburton Road West) which crosses the canal and there is clear access to the towpath from it. There also appears to be a path from the road swing-bridge to the towpath by the aqueduct so no need to go to any trouble, I'll sus it out when I get there.
It's a waste really. The Merry Hill shopping centre near Dudley has the canal skirting one edge and they've made a feature of it. Landscaped it, put in moorings (I think they want the boaters to go shopping there) built a waterside pub, hotel and cafes along the waterfront. It's quite attractive really. Streetview seems to have covered it quite comprehensively and there seem to be quite a few photographs uploaded to Google earth by visitors.