So does this mean every satellite is pressurized for its internal components sake? If it loses pressure due to say foreign object does that make it basically die due to temperature death?
No. Gases are the most easy way to understand temperature, but the concept is not limited to gases. In solids, you need to consider the collective motion of many atoms which you can describe as virtual particles ("phonons"), but there is an equilibrium temperature as well. Since all parts of a satellite are usually connected, you can use heat transfer via solids as well as radiative heat transfer to move heat around. The engineering gets more complicated, because if something gets too hot, you cannot just slap a fan on it. In the end it is usually worth the effort, because pressuring a satellite has a lot of drawbacks which you want to avoid.