My thoughts are the same, regarding a higher mileage better serviced Bike is a reliable one.
Any Bike in regular use, or used on regularly long journeys is one the owner is likely to take good care of to ensure it is reliable, trustworthy & will get them from A to B, to C and so on. Carrying out regular maintenance, pre-emptive maintenance & ensuring nothing left 'wanting'. And probably has a stack of receipts and invoices for everything carried out as 'proof' of work.
A Bike used less regular is likely (IMO) the opposite - things that need doing get delayed, the service is done as/when rather than at the mileage of time service & niggles are left because it doesn't need to be reliable.