Can't subtract that PS+ unless you can state that the person will never play a PS4/PS3/PS Vita game online again.
Sure you can put together a semi decent PC to play FFXIV, hell, you could by just about any $400 econo-box, slap in a $100 low end video card (even today's low end cards are more than capable of running FFXIV 3.0) and play. but many people do play games on consoles, and not on PC. I have a laptop that is capable of playing FFXIV, but stick to the PS4 for the larger screen and controller support. Not to mention that the PS4' less powerful hardware (compared to my laptop) runs the game better because my laptop's GPU is a mobile one and can't quite match up to the more dedicated GPU hardware in the PS4's APU.
The biggest problem that PC gaming faces - in my mind - is that compared to consoles, playing games on a PC is a bit more involved since you may need to tune your set up, make sure that your drivers are updated, configure your controller, install software, update it, update windows, etc...
If I compare running games on my PC to running games on my PS3/PS4, the console is simply easier and more relaxed than the PC. And before anyone says anything they'll regret, I have built many PCs, upgraded and repaired PCs both personally and professionally. I've worked with PC hardware since about 1985...yes 1985, not 1995, not 2005...so I think I can honestly claim a wee bit of knowledge. I've played with PCs since they used 8086 CPUs and even the VESA local bus video was yes to be a twinkle in the eye of it's creator, PCI and descrete GPUs were not even on the horizon. Professionally I've worked on PC software/hardware, network infrastructure and every version of Windows (all the way back to Windows NT, Windows 95, Windows for Workgroups, Windows 3, Windows 2, DOS and all the variations). I'm more than happy to work with PCs.
However, I'd still far rather game on a console for a variety of reasons not least of which, it's easier both on me, and on the wallet.