The bitrate is just as, or more important than, the numbers in my estimation. I base this on what my eyes see. Give me high bitrate 1080p over 4K YouTube any day.
Fox, ABC/ESPN broadcast in 720p, likely because back in the day it was better considering their equipment and infrastructure for delivering the signal. It looks fine here upscaled to 4K on my cheap to middle of the road 7-year-old TCL television.
Go by what your eyes see, not some silly numbers the provider uses for marketing.