Not quite.
RadioShack failed when they attempted to be a cell phone store, failed, and then tried to shift their focus back to DIY, which was a nice sentiment except now we have the internet, so nobody is going to get conned into buying a 5 dollar resistor, especially when you only have two packets in stock.
In the 70's and 80's they didn't make their money as a DIY store, but rather the spencer gifts for nerds. They sold computers, r/c cars, robots, experiment kits and more, all under Radio Shack branding and all exclusive to the store. Yes they also kept the tinkerers satisfied, but that wasn't their main source of revenue since the early 70's. They had sense enough to know that both were essential to the business model though as they didn't seem legit without the isles of parts and cb equipment.
The fact that the phone company that, in our neck of the woods at least, was always directly beside RadioShack in any mall/shopping center was who bought them is particularly sad. It's like the CEOs never saw one of their stores out in the wild or something.