A lot of assumptions that you laid up there.
Let's break down where you get things wrong:
- While Horizon is currently 50 dollars, the cheapest it has been officially on Steam is 12.49. It's never been 12.49 on PS Store to my knowledge. This routine deep price cuts are largely unique to PC and it is the primary reason why PC games do high numbers in unit sales, but less in revenue than Console. That being said as I mentioned before, that can still go along way towards recouping development costs.
- The costs involved in running a PC Storefront for Sony is going to be cheaper than most companies. They're already running a storefront that is on PC. The PlayStation website. The cost to add skus is negligible. What you're referring to is the cost to create and maintain a PC launcher.
- The revenue saved from not giving Steam a 20% cut of their software sales would more than make up the costs of running a launcher. The revenue from Spider-Man 2 alone could probably cover this.
- Sony doesn't need to copy Epic's failed model.
- If I were Sony, I would bundle PS+ Premium with Crunchyroll and offer 1 free PC game per month. That's going to get a lot traction than buying a multitude of games every month.
- Ask yourself if Epic, EA, or Ubisoft could launch a console tomorrow with only their games selling it.
- Sony has a massive advantage of being able to leverage 3rd party support from their console.
- Sony's first party games are all single player games? What's the top game out right now? It's Helldivers 2, which checks notes... is multiplayer.
- MLB the Show... multiplayer. Gran Turismo... multiplayer. Fairgames multiplayer, Concord, multiplayer, Destiny, multiplayer, Marathon, multiplayer, the rumored Twisted Metal Game, multiplayer, the Horizon MMO, multiplayer...
- Sony actually has a long history with multiplayer. Just because they leaned into their success with single player games with the PS4 doesn't mean they can't do multiplayer. The biggest reason they focused on single player was because the PS3 was so behind the 360 when it came to online play.
Maybe you guys just need to study more businesses to open your imagination. Look at MoviePass which was a failure and look at AMC A-List which has been a huge success. Look at why one was doomed to fail even though the other one had a great chance at succeeding. Look at why the PSP was a success while every other handheld failed. Look at why the Vita failed despite the PSP being successful.
Your arguments are baked into thinking that a company has to follow the same model as another company that has already failed or that two companies using the same model are guaranteed the same results and that dominant market leaders always stay dominant.
Sony can also be successful by embracing gaming on Mac, something Steam has really struggled with.
Success for Sony on PC might just mean expanding PS+ subscribership or converting unpaid Crunchyroll users to paid.
By the end of the decade I guarantee you that sony will have a home console, a handheld, and a PC launcher.