2017 Macbook-Pro did not want to turn on?
The System Management Controller is a subsystem responsible for power management as well as fan control. It is not unusual for it to get into an undefined state. Power spikes, i. e. can occur at any time and may influence the SMC. 

So the question is not why or when it happens but how to resolve it. You have already posted the answer which is to perform a SMC reset. Therefore keep going with your MPB—there doesn’t appear to be any problem.