I've explained why the new glass is easier to scratch. I have absolutely no doubt if you didn't invest a few dollars in a screen protector, your glass has likely scratched. Why do you think at Apple Stores around the world, Apple installs screen protectors from Belkin on iPhones every day of the week? To protect them from scratches, of course. They are not required and if you didn't ask Apple about them, that's on you, not the store you may have gotten your phone from.
Samsung phones employ a very similar glass composition and of course they should have a screen protector installed. I've read, but cannot prove that the screens on Samsung and Apple phones are made of the same material. ANY expensive phone should have a screen protector. It just makes sense to invest a few dollars to avoid scratches. Especially, if like you, they might upset you to get scratches. It would certainly upset me. That's why when I get a new iPhone, it gets a new screen protector installed before it's even turned on.
Years ago, when people dropped an iPhone, they shattered easily. It cost people hundreds of dollars to put a new screen on their iPhone. With Ceramic Shield the incidence of broken screens dropped dramatically. Why? Because the glass can flex easier, making it harder to break. But that has a reverse effect, in that softer (less breakable) glass can be scratched more easily. The benefit is it saves people hundreds of dollars if they accidentally drop their phone. And people who wisely spend a few dollars to protect the screen from scratches have an amazing combination.
You suggest Apple employed low quality to save cost. Nothing could be further from the truth. The new glass is actually pretty amazing. But no one has yet to make glass harder to break which is equally harder to scratch. If you want to become richer beyond your imagination, you should try to create such glass. Until then, most people put a screen protector on their expensive phone out of the box, as opposed to complaining on an internet forum about their screen becoming scratched. Too bad you didn't do that.