No. The complexity does not make anything break. You only have to engineer something once, and coordinating the failure rates of the different subsystems is part of the engineering.
If anything, managing the additional complexity by skimping on the engineering work is what causes the failures--that is, engineering a more complex device with the same or smaller engineering effort.
The ideal situation when engineering a new device is that every part of it is likely to break simultaneously, the day after the warranty runs out. If that happens, you know that your device was made as cheaply as possible, but no cheaper, and that you will never need to repair such a device, because buying a new one will always be cheaper.
Repairs are only an issue when different parts are likely to break at different times.
If anything, managing the additional complexity by skimping on the engineering work is what causes the failures--that is, engineering a more complex device with the same or smaller engineering effort.
The ideal situation when engineering a new device is that every part of it is likely to break simultaneously, the day after the warranty runs out. If that happens, you know that your device was made as cheaply as possible, but no cheaper, and that you will never need to repair such a device, because buying a new one will always be cheaper.
Repairs are only an issue when different parts are likely to break at different times.