A serious question from an only exclusively Chinese watch owner

I've had Chinese watches for like 6-7 months now. I started with a red star 1963 watch, and I've had it for 6 months now. I also own a custom engraved tandorio which I take swimming since it's 20 bars. And a couple of days ago I bought a seagull Roman numerals watch, I'm awaiting shipment for this one. And theres some more as well. so, exclusively Chinese watches.

I've been thinking about purchasing a Seiko, Tissot or Rado watch recently, and all I can think is "WHY?". Cause they cost at least 4x the price of any of these watches. The Rado will probably cost me 10x the price of any of these watches. And do they add any value? I don't see it. Like neither one of these watches look like they're getting any less valuable over time. The movement is accurate enough, even though I might need to adjust is once a week, it's still not a problem for me. I reckon I'll probably even be able to use it 10-15 years or more if I just service the movement. What am I missing here? Why do I need to purchase the Seiko or Rado or Tissot? If it's just for myself and not a gift for someone else.