Photoshop being easy to pirate was a feature for Apple: the uptake was absolutely insane across all possible levels and eventually nobody uses anything else. Same with Microsoft in 90s: when students asked Bill what he's planning to do with the whole China copying it, he replied that let them get used to it and we'll find a way to charge later.

*a feature for Adobe, not Apple

All too often the proprietary piece of software sucks, including their price, but its still the best. For example Burp Suite.