No, thats not the same thing. A trial version is akin to advertising. The developer gives you free access for a time, or with limited options.... a "taste", if you will..... in the hopes that the trial will result in a new customer. The developer knows that many who try will not buy, but enough will that the trial version makes economic sense. It's not theft if you're in a grocery store and they offer you a sample of some food they're preparing, in hopes that you buy some of it. Trial versions are the same thing.That logic doesn't work at all. What if I only need a feature once, so I use a trial? If I hadn't used the trial, I would have had to pay for the software. Therefore I'm depriving the designer of money. By your logic, that's theft.
Again, you use faulty logic. The library paid for a copy of the software, so the developer got paid.What about if I use a piece of software on a public terminal, such as in a library? What if I make that use a regular practice so that I don't have to buy a copy? Is that theft? By your logic, it is.