Pathfinder Adventures has always had the problem where it isn't sure if it's a paper card game directly translated into the digital space (with attendant tabletop-style premium pricing for separate modules) or a F2P mobile loot grinding game or, now, a "normal" single-player PC game that comes with all non-DLC content "out of the box."
So this leads to different segments of its audience perceiving it differently.
If, for example, you paid $25 to unlock all the scenarios and base characters on mobile, then you may feel that those digital items--the scenarios and characters--are what you bought, not access to the client software, which is already free. Then paying an additional $25 (or whatever the price is going to be) extra just to utilize those same digital items on another client app might feel like a rip off. (i.e., the Gwent and Hearthstone model)
Or you may view the PC version as a separate self-contained thing from the mobile version that happens to carry with it a bonus of syncing your progress between different platforms (i.e., Playstation and Vita games that are cross-save but not cross-buy).
It's all in the eye of the beholder (heh), and no one is objectively right or wrong, it's just that the game is chimeric in its design, pricing, and marketing, likely due to the need to profitably expand the audience beyond the niche tabletop audience, especially since the game has a lot of complex rules that need intensive developer resources, while still being faithful (perhaps too faithful) to the original version. To be fair, it's a hard tightrope to tread.
(Although this inconsistency can lead to odd scenarios like if you paid for the Steam version first, you'll get both clients for $25, but if you paid for the mobile version first, both clients cost $50...)