I can't really agree that 'LVM makes it easier and safer' to do disk-juggling operations. If your system is up and running happily from its system disk, and you have a couple of RAID arrays to manage, then yes. But for single-disk systems it seems to get in the way. For example, suppose you want to upgrade your hard disk. With Slackware it is a simple task to plug in the second disk, boot the machine, partition the second disk and copy everything across, and install the boot loader on the second disk. You're now ready to go. With Fedora and LVM, on the other hand, making it work requires a complex series of LVM commands; fdisk looks positively intuitive by comparison. In the end I gave up trying to move my system to a different hard disk and just reinstalled from scratch. Yay LVM!
To me, LVM is like git. It's hugely powerful; but as a beginner, or someone who doesn't use it often, you really long for a simple interface that will print out "WTF is going on" and guide you through the possible steps.