Having gone through the same newbie phase last year as @babaganoosh, I can empathize with the confusion when looking through a forum with 10+ years of postings and trying to make sense of completely new devices like the RPi, programs like dump1090, and weird terminology like “mutability.” I give our new member the benefit of the doubt that his response to @obj regarding dump1090 and Windows isn’t so much “I don’t believe you” as it is “I’m seeing conflicting information.” He’s seeing older postings in place like here Feeding PiAware from dump1090 for Windows referencing instances back in 2014 when, apparently, you technically could use a Windows instance of dump1090 to feed FA (via PlanePlotter, it seems). It further looks like this capability was discontinued in January 2019 as per here PlanePlotter Support And FlightAware. So @babaganoosh I understand your confusion, and I know that enthusiasm to get your equipment running can override patience to search for answers in favor of posting more questions. But that searching is part of the fun, and you learn a lot more by reading past answers and doing the detective work whenever possible.
Incidentally, regarding FAA’s acquisition of ADS-B data, it would be cool to think our equipment is playing a real role for ATC, but they maintain their own versions of our receiver equipment at their Ground Based Transceiver sites across the country. Here is a neat guide I found: https://www.faa.gov/air_traffic/flight_info/aeronav/acf/media/Presentations/13-02-RD261_Charting-ADS-B-GBT-JCollins.pdf. ADS-B data is too critical to trust to individual folks putting up antennas on their wives’ she-sheds.