Physical industries are very different than software. Leather shoes are made many times, 1x per customer. Code is created once, using the same product for all customers. This gives a lot more leverage on investing in a quality product.

I also don't agree that software is disposable for the same problem. If it's a temporary problem sure, the code is thrown away and we create something new when another, different problem comes up that can be solves with software.

But if it's an enduring problem? The code sticks around.