Ironically, the Atari -like joystick from the 2000’s from Walmart for $15 that plugs directly into your TV with games stored in the joystick is a better joysticks than the original 2600 joysticks.
However, I would contend that the Intellivision controller was worse.
I had a Colecovision (and Vic 20), and although I will say that was better than the 2600 and Intellivision joystick, I have to emphasize to all these youngsters complaining about the original NES controllers that those were still an improvement over previous default joysticks.
I was 95% k+m until the Steam Deck (the 5% being my old Saitek Flightstick).
Since the Steam Deck I’m probably 90% controller.
I will say that k+m offers superior speed and precision, especially in FPSes, but the biggest improvement that I noticed was that I was getting a sore shoulder from repetitive strain sitting too much time in front of computers. Controllers are more ergonomic.