I think ideas do matter. Not ideas like the one click order or hey let's put a buy button in a game, but how to accurately recognise everything that's said in a room full of people, how to seperate sarcastic from factual statements in text, how to predict the number of bananas that need to be on the shelf next saturday.
The problem with you copying my invention is that you didn't share my research costs, so you could easily beat me on price. But as they are software solutions, I can bring them to market myself without much difficulty. I can hire or partner with the best UX designers and marketing people and I'm protected by copyright.
I wouldn't want to stop you from working out similar ideas and compete with me, nor would I want to become a law firm spending my time in court with people who had similar ideas. Patents are a danger and I don't need their protection because software ideas are either trivial and shouldn't be protected or they are complex and don't need protection beyond copyright and contract law.