For me the sole reason I haven't bought a X1 is the lack of exclusives. I just see no reason in owning one if the titles can be played elsewhere. The 360 lured me in with it's exclusives, and though it wasn't my main console, it had enough exclusive content for me to justify a purchase. Obviously if the nextbox follows the same route as the X1 i'll skip it again. Same goes for Sony aswell, If they start putting everything on PC then I'll just switch to PC and probably end up pirating 80% of the titles and buying the few I liked. I don't see any point in consoles without exclusive incentives when the games can be played on superior hardware personally.
I think you're the type of person MS is not concerned about.
Supporting PC gives them as access to a significantly larger userbase than consoles have alone. And again, there is many users around the world who only use console or PC. Software revenue can go up significantly even if it may sacrifice some console sales.
However, there isn't concrete evidence that supporting PC has a significant impact on console sales. Look at the most active games on Xbox given MS actually shares that information, virtually all of the content on that list is content shared by PC and Xbox. Why are people playing those same games on Xbox when they can get a better experience on PC? Maybe because a vast majority of console gamers aren't interested in buying a gaming PC. Nor can you buy a PC that plays high end games as well as a console for the same price (sometimes $150-200).
You said you rather play Xbox games on a PC, which is fine. As long as you're playing their games somewhere MS has suggested they're happy. But if you're gonna just pirate everything, you just don't matter. We're seeing MS games succeeding on PC with no real evidence of hurting Xbox. It may just be the opposite, Xbox and PC sales combined is increasing their software revenue.
What hurt Xbox the most this gen was poor decisions made at launch. Price was too high due to Kinect, some of their exclusive software wasn't ambitious or notable enough and frankly they should have had more studios years ago. Sharing games with PC is talked about a lot but not nearly as significant as other factors I mentioned. The proof of that is best selling console games are multiplat, PC included.
River City: Rival Showdown for 3DS (3/5) - River City: Tokyo Rumble for 3DS (4/5) - Zelda: BotW for Wii U (5/5) - Zelda: BotW for Switch (5/5) - Zelda: Link's Awakening for Switch (4/5) - Rage 2 for X1X (4/5) - Rage for 360 (3/5) - Streets of Rage 4 for X1/PC (4/5) - Gears 5 for X1X (5/5) - Mortal Kombat 11 for X1X (5/5) - Doom 64 for N64 (emulator) (3/5) - Crackdown 3 for X1S/X1X (4/5) - Infinity Blade III - for iPad 4 (3/5) - Infinity Blade II - for iPad 4 (4/5) - Infinity Blade - for iPad 4 (4/5) - Wolfenstein: The Old Blood for X1 (3/5) - Assassin's Creed: Origins for X1 (3/5) - Uncharted: Lost Legacy for PS4 (4/5) - EA UFC 3 for X1 (4/5) - Doom for X1 (4/5) - Titanfall 2 for X1 (4/5) - Super Mario 3D World for Wii U (4/5) - South Park: The Stick of Truth for X1 BC (4/5) - Call of Duty: WWII for X1 (4/5) -Wolfenstein II for X1 - (4/5) - Dead or Alive: Dimensions for 3DS (4/5) - Marvel vs Capcom: Infinite for X1 (3/5) - Halo Wars 2 for X1/PC (4/5) - Halo Wars: DE for X1 (4/5) - Tekken 7 for X1 (4/5) - Injustice 2 for X1 (4/5) - Yakuza 5 for PS3 (3/5) - Battlefield 1 (Campaign) for X1 (3/5) - Assassin's Creed: Syndicate for X1 (4/5) - Call of Duty: Infinite Warfare for X1 (4/5) - Call of Duty: MW Remastered for X1 (4/5) - Donkey Kong Country Returns for 3DS (4/5) - Forza Horizon 3 for X1 (5/5)