That statement may have been true ages ago when breakdown maintenance was the norm and machines were taken for maintenance only when they broke down. Organizations soon realized that breakdown maintenance led to much higher maintenance cost and much longer machine down time, because often the spare parts were not readily available to replace the broken (literally) item.
Soon organizations introduced periodic or predictive maintenance and then systems are now available to track the condition of various critical parts of the machine on line while the machine is working. This way the spare parts which look like liable to fail are kept ready and the actual down time of the machine is the least.
Waiting for a machine to break down to take it for maintenance is now an outdated concept. So it is ludicrous to make a statement as mentioned.