*Ahem*
"
Philosophy seems more often used to justify a person's own ideas, rather than to question them and understand their limits.
"
Do you like the irony?
I see. For me, although there's nothing directly applicable about learning it, it has helped me better understand the arguments people make and be better prepared to deal with them. I sort of always thought that was an INTP thing, but maybe most here don't care for it.
But I'm not sure how you got the idea that philosophy isn't true in real life. Historically, it's largely been a pursuit of truth in the face of unknowing, an aim to understand and clarify reality.
More practically though, it's equivalent to a blueprint for building a house; how the house will get built requires applicable science, but what it's built for as outlined in the blueprint is what's relevant to its purpose. Can science without a purpose be worth anything?
You don't have to though to get something out of philosophizing. Socrates is attributed with the quote "The unexamined life is not worth living." Do you disagree?