Here's my rule of piracy if you're buying something

• You're really passionate about the product and you really want to support the developer or publisher

• The game gets frequent updates which you see value in which causes issues whenever you have to download updates separately from another site

• there is some type of online or connect feature that you cannot get offline that you see value in... This can be mods or multiplayer etc

Or if you want to play a game on a steam deck and it's really cheap. After all, you and I both know it's incredibly easy to play something on steam deck straight from Steam rather than having to shortcut to a pirated exe