I think your wrong for all sorts of reasons...mainly engineering ones. I would admit if cars have 'equal' mileage the one that has done less runs of low temperature and less stops and starts is far better. By comparison but your not making a comparison.Although I admit cars do need to be driven, high mileage has its pitfalls and they are of course huge.
Materials and components are only made to last so long, not in time but in hours of use.
Issues such as wear and tear are obvious, not so obvious is temperature cycle degradation. Stops and starts give more wear than many miles of motoring so when you buy a car with high mileage it could be an indication of the issues mentioned but it could be much, much worse if the car has had many stops and starts or short runs below optimum working temperature etc.
On average BHP will drop by 30% for every 100,000 miles unless particular measures are taken (often expensive ones) to make some of this this up.
The fact is if you have a car from new or from very low miles you know the history and that's important. But when buying a car you have no idea, apart from whats on the clock, so a healthy respect for the deterioration caused by high mileage is sensible.
wow my v8 soarer with 225k had 250bhp when new
so now its only got just over 100bhp :eerrrmm: