Heritage leather will scratch and patina. I think we have all been brainwashed so much by a lot of the big brands not to like the smoother leathers, but the reality of it all is, smooth leathers like heritage leather of Duclos, barenia/swift/box/tadelakt of Hermes are the leathers that have the least amount of finish to showcase their exceptional quality. Caviar leather of Chanel for instance, is heavy graining and coating to mask all the natural imperfections (a lot of them) of the leather they use. The quality is much, much lower. Leather is categorized by its flaws and the less flaws they have, the more premium their classification. Tanneries won't coat those leathers heavily unlike the ones with lots of marks. It's like a person's face -- why use foundation and concealer on your face if your complexion is flawless. Natural beauty is so prized today, which is why beauty companies make loads of money -- to help enhance beauty for peeps who don't have flawless complexion (haha I spend on foundations and concealers for this same purpose).
The beauty of the heritage leather and those other leathers i mentioned from hermes is this -- it is the best quality of leather, it will age so well. 20 years on, the leather will patina but the bag will still be in excellent shape. The beauty of it all is, the bag will grow with you, together! I love this idea and more importantly, it has given me a much deeper appreciation for premium quality leather at its least "processed/coated", more "natural" state. Hope my explanation somehow helps ❤️