I found out how does the AC system work and how much is its pricing?

I looked up at the Auto Zone website and it said that the clutch of the ac compressor is warming the refrigerant and sending it to the condenser to be cooled and then it goes to the evaporator which cools the inside of the car, and google said that an ac compressor replacement runs at $1,250 dollars including $1,000 for the compressor and $200 dollars for labor but Auto Zone sells a remanufactured ac compressor for $417 dollars which can be marked up by the repair shop for $200 dollars extra or $650 dollars and $200 dollars labor costing less than $1,000 dollars, as for the electric power steering a steering wheel position sensor and a small electric motor assist the steering wheel, and a gas pedal position sensor operates the electronic throttle butterfly valve, 2carpros. Com didn't answer my three separate questions about air-conditioning, electric power steering, and electronic gas pedal which I had posted three days ago but today it's the internet age and I found out the answers myself anyway and it's not the primitive times of 1999 when 2carpros. Com started up, I see that most 2carpros. Com viewers have 20-year-old and older cars and many questions only have one answer on them meaning many 2carpros. Com viewers are sassing and disrespecting the 2carpros. Com staff as by not giving feedback on how 2carpros. Com did, and how can those 20-year-old and older cars last so many decades? I painstakingly and diligently did three month interval bulk synthetic oil changes at Walmart to make my Nissan Versa last nine years but those other 2carpros. Com viewers don't maintain their cars so how can those poor cars last 20 years or older?