Cheap Chinese tyres are an indicator of low or uncaring maintenance. Brand name tyres such as Pirelli or Goodyear show that he cared for the car and his safety. There’s nothing wrong with cheap Chinese tyres.
They work. Prestige cars should have HR rated tyres an example 185x55x17HR. Budget tyres will have an R rated tyre example 165x65x16R. The reason to look at the tyres is not just to check they are ok. It’s also a good indicator of how well maintained the car may be.