This is the reality of most people though. People who use their PCs for more than gaming are more than likely not going to want to go through the hassle of running a long HDMI cable through their house or pay the extra amount needed to wire it through their walls, just so they can use their PC in both an office and a living room. Your approach is the exception, not the rule.
For example, if I wanted to do a similar approach, I would have to run an HDMI cable from downstairs from my office, which is located on the front, left side of my house, to upstairs to my media room, which is on the opposite end: back, right side of the house. Thinking of my other friends' homes they would too either have to run a cable across floors or at least across the entire house to go from office to living room/media rooms. This just doesn't work for most people. It is fully dependent on the layout of your house and if you are okay with unsightly wires/trip hazards running across your house.
I never understand PC gamers who go on about this, without looking around them, seeing how they are the exception when compared to how most people want their homes set up.
I am a home audio enthusiast. I go the extra mile to setup my home theater the best that I can so the audio is the best it can be for the room. At my old town house, I ran speaker wire and speakers all over the living room, to get the best setup possible. In my current home, I have a dedicated room to setup exactly how I want. Too me, this is an easy setup. When in the town house, I was happy with speaker stands for large speakers being in my living room, because it was something I am into and is important to me. However, I also recognize I am the exception when compared to most. You go to most people's homes you are lucky if they have a soundbar paired with a subwoofer, let alone a full on home theater setup. Most people do not like the sight of speakers in their living space and/or just don't think it is worth it. Even though I think having a full home theater is the best way to watch movies and TVs, I do not claim how easy it is for everyone else to set something like this up. I also do not think I am somehow superior than those who do not prefer to go through the hassle of setting up a home theater. It is just a different preference on how people want to enjoy their entertainment.