@Queso: You are of course welcome to do whatever you find most comfortable. I do not support distro provided calibre packages for good reasons, but, if you prefer them, feel free to use them, the only caveat being that you wont get help from me
Personally, I find the idea that a small team of distribution package maintainers can effectively (and continuously!) review thousands of packages for bugs whether security or stability related, better than the developers that created the software to be rather incredible. It may well be true for software that is not actively maintained, but for software that is actively maintained, it just doesn't seem very likely.
And, in practice, I have found that distro maintainers introduce far more bugs than they fix. But, YMMV.