And if you haven't the money to buy something ,it doesn't matter if you are 13 or 30,it is still stealing!Stealing isn't even necessary for food ,clothing,or shelter;if you can't get those from charities,then the government will take those things from people who worked for them and give it to you in much of the world.
As someone pointed out, it's not theft, it's copyright infringement. They are two very, very different things. You've been reading too much propaganda.
Now, you could argue that infringing uses contribute to piracy at large. Lost revenue is only an issue when 1) someone gives or receives something of value for a pirated copy or 2) someone who would have paid for a legal copy obtains a pirated copy for free. When I was 13, I was neither of those. I just wanted to play ports of my favorite arcade games, and most of those ports were quite bad compared to the originals--certainly not worth $50 if played less than 200 times, assuming the arcade version was $0.25.
As an adult, I've spent tens of thousands of dollars on software. I get heartburn just thinking about it. Despite that, publishers continue to put out crap software. If I could return crap software to the retailer, I would probably buy more than I do. As it is, buying software is always a gamble.
Case in point: After years of using trial versions of Hex Workshop (my favorite Windows hex editor), I purchased a license. Shortly after purchasing the software, I found a bug. I've reported the bug to the developer four times over the last six months, and I haven't received a response. The feature I specifically purchased the software to use does not work. Normally, the warranty of merchantability would apply, and I would receive a refund. Not so in the software world, where publishers and developers can sell you crap labeled as gold, and there's nothing you can do about it short of a lawsuit.