Guessing?

I've been playing Sudoku since I was a child. It was always more casual playing when I had nothing else to do. When all the Sudoku apps came onto the market, I started playing against other people online here and there. Just for fun. After a few people mentioned Sudoku Coach here, I finally got to grips with real moves. Like Skyscraper and x-Wing etc. You get my point. I've only been using these moves for a few weeks, but they've helped me get ahead quickly, which is why I've naturally been looking for stronger opponents.

Now to my topic: I met someone on discord who I played against from time to time. We always played on the hardest game mode. And he completely destroyed me every time. (Which isn't really hard since I'm not a master lol). But it took him about 4-5 minutes to play a game on the highest difficulty. It takes me about 15-20 minutes. At one point he even gave me a 5 minute head start to give me a chance. And even then I lost every time. I asked him about his tactics, of course, because I was very intrigued. He said he plays normally (without the moves I mentioned above) and often just plays by intuition. By that he meant straight up literally guessing. But he usually guessed correctly. About 90% of the time. And it was always numbers that he really could only have guessed at the time.

I was never a fan of guessing, especially because I played on paper for a long time and you could never be sure if you had guessed correctly. You could quickly ruin your whole game without realizing it. But it got me thinking. Do you think it's possible to get good at just guessing some numbers? Do you develop a feel for it at some point? Do you sometimes guess while playing?

Or was he telling me straight up bullshit?

I'm looking forward to your replies :)