I want to travel the world and move from place to place if I have the opportunity

Are we the same person lol? I would love to travel as well. There is just so much of the world to explore to stay in one place. But you are right, I believed the same thing as a Muslim: find a good, religious spouse either during/after uni and have children and raise them as pious Muslims. Because, according to the Quran, children are the "adornments" of this life. I used to consider it my duty to follow the commands of Allah in this sense.

I am sorry to hear about your upbringing.

It might be a shitty thing to say, but I enjoy having money and spending it on things I want

Oh, I don't think that's a bad thing to say at all. It's your hard-earned money, you can spend it however you like. Personally, I aspire to one day start some sort of charitable imitative to help those in need (there are details to this, but I of course cannot write them all here!) and don't feel like I can do all the things I want to with children, either.

I think it's better to not be a parent than be a crappy parent.

I completely agree. I wouldn't want to risk having children and then not being able to raise them properly for whatever reason. It would be unfair to them.

Pretty much every scientific paper shows that having kids does not make you happier or your relationship better

Oh, I find that quite believable. The only reason people have children is either cos 1) they want someone to take care of them when they are older or 2) they want unconditional, undying love from someone.

There are already too many people on the planet and it's going to get worse.

Yet another reason not to have children- the world is overpopulated, and messed up. Why bring an innocent child into these miserable conditions? I would not be able to protect them from everything. And yes, I am definitely considering adoption as one of my options (especially from back in my home country).