Problems related to garage doors never seem to end. They're not always serious or threatening to one's safety but they're still problems and must be solved. The obnoxious thing is that repairs are often needed on a regular basis. You maintain the system on October and you must fix the tracks on November. Aren't we supposed to tune up the overhead door and then forget about repairs for a while? Why do we still have to come back to fix more parts over and over again? Will this game ever end?
Don't change your beliefs about garage door maintenance. It's certainly the best way to keep the door moving properly and the whole system running at its best. If you find that repairs are still needed a few weeks after your mechanism was maintained, consider that there are other issues which might cause the problems. Never forget that garage systems are tremendously affected by many factors and it's hard or even impossible to deal with all of them at once.
Don't disregard the possibility of sudden incidents, which might change the behavior of the system. Your door will move fine until your garage door tracks are hit by your car. The brackets will secure other parts fine until they're loosened up when you left the door open in a very windy day. External factors are always unpredictable and there's nothing you can do about them. In these cases, you should be happy if the door is properly maintained and won't fall, sag, blown away or remain open when accidents happen or when hurricanes strike.
At the same time, you should consider that garage door parts age over time. If you decide not to replace the sort of rusty hinges during maintenance, their condition will worsen after a while and you'll have to replace them a couple of months later. All parts have limited lifespan but the quality of their materials plays a great role to the strengths as well. Nylon garage door rollers, for example, might be fine on October but they might break at the end of November since they're sensitive. Consider the age of the whole system as well. Old doors and parts do not have the same power as new ones. Overtime, they'll become more demanding as far as their maintenance is concerned.