Yes, of course. The car is the system.
You might not believe but one of the biggest contributors to reliability issues is vibrations and resonances. Those could be especially tricky because basically everything in the car (including the crew weight) has an impact on them and whatever you change might surpise you in the long term. Even with the most modern simulations the only way to avoid issues with them is testing, testing and another testing.
Also as dimviii said, better reliability could mean also longer service intervals. Everyone wants his parts to last longer, that applies especially for the private customers.

