I've been to several of these places and I just don't hold them in the same esteem as you do, but there's nothing wrong with that. I will say the walk from the T station to the Tipsy Toboggan is a bit of a haul and not very scenic, while hoofing it to Columbia Rd really seems like a long distance for not much payoff. As an aside I had the pleasure of camping out overnight on the USS Massachusetts with my boys scout troop and while it was uncomfortable as all hell the staff did a really good job. I recommend trying it...once.
I'm not familiar with Fall River at all, but from looking at things on google maps, I suspect very few people (including myself) would make the walk from the station to the Tipsy Tobogan or any of the other interesting sounding places near there (brewery, tiki bar). I would definitely bike it, though, so when I make my likely trip down there this summer, I'll bring a bike on the train with me. But a bike shouldn't be required to reach the interesting destinations from the train station.
It's
definitely a lengthy walk, but nearly the entirety of it can be and frequently is done on the
Bicentennial Trail/Boardwalk which runs on/over the water for the one mile between Bicentennial Park and the Battleship. Is it the Newport Cliff Walk? Absolutely not. But it's pleasant and there are some nice views of the bridge, Battleship, Borden Light, etc. Walking the length of it is popular in warmer months. Alternatively,
there's a water taxi ($3pp) that runs between the Tipsy Seagull and Bicentennial Park with stops in between. A good option if you don't want to walk both ways. Weirdly, Google Maps doesn't seem to acknowledge that you can walk (or bike) the entirety of this along the waterfront. You can (and should).
I'm also not claiming that any of those places is going to be the best meal anyone's ever had. Just pointing out that "there's one restaurant" is more than a little misleading. And the atmosphere in that area in the summer is kind of... unique. Particularly down by the Tipsy Seagull, Morgan's, Pier 52, Canned Heat, etc. They jokingly call it "The Fall Riviera" and it's not far off. Jimmy Buffett meets an old industrial town in New England. Certainly worth experiencing at least once.
I would argue that getting Portuguese food on Columbia St. (along with a stop at a bakery and market) is probably the
best thing someone from outside of the area can do with their time in the city. Yes, it's a lengthy walk, but you'd pass the
Gates of the the City which is a replica of/monument to Sao Miguel's Portas Da Cidade in the Azores. Worth a visit. And the
food at Sagres (or one of the others in the area) is very good and not easy to find in the Boston area.