I don’t think most people go on vacation so they can jog and ride their bikes — walk maybe from their hotel to wherever, maybe. But their primary reason for going on the vacation is not to walk from one place to another.
Now, does Pittsburgh have adequate tourist attractions? I’m not so sure....Carnegie Science Center is nice, but a lot of major cities have hands-on science museums now. Some will come for the ball games (Pirates, Steelers, Penguins, even Pitt) but most major cities have that too. I don’t think anyone goes on vacation for the parks and greenways, unless it’s a big park and you can camp overnight.
They built a large convention center some years ago....I don’t think they had the hotel space to support large conventions though. I’ve been away for a while; I get back occasionally so maybe the hotel space has caught up.
I’m looking over the convention center’s schedule....RV Show, Auto Show, Bead/Jewelry Show, Home and Garden Show...I think these are things people from the metro area come to look at rather than stay overnight for.
The only US city we enjoy for walking is San Antonio’s canal system. Venice Italy is a walkable canal city.
Another reason people would go to these cities is one of a kind arts. Paris has the Louvre, D’Orsay and Versailles. Not to mention restaurants and cafe’s. These amenities go hand in hand with walking.
How Pittsburg would pull this off remains to be seen, but I would advise them to build canals. It would take guts for the planners, but they have to think big and bold.