Every single other Japanese publisher switched from delayed releases as their introduction to the PC, and quickly switched to day and date as they seen success, and those day and date releases have seen bigger successes than most delayed releases are.Turn that around: Where's the evidence that are going to sell more units by releasing it day and date with the PS4 version?
The plain fact is that this is an entirely untried franchise on PC, whereas it does have a significant history on console, Sony platforms in particular. Does it not make sense to leverage that existing fanbase ans relationship with a platform holder in order to get additional promotional consideration as a quasi-"exclusive"?
After all, this game is only getting a physical release on console, which by its very nature has specific marketing needs and is generally more timing-critical than just putting it up on a digital storefront like Steam.
Most of all though, they can far more easily afford to take a hit on the RRP on PC, as without the license-fee they are looking at deeper margins per-unit anyway. Which is ideal as PC is based on precedent, not the primary platform here, Japanese Playstation users are.
This is just logic.
Also lol @"significant history" when talking about a series with only one single title released, one that didn't really sold very well.