Look at it this way:
If you maintain your passenger loads for all routes at 100%, there will be several advantages to this, most notably:
- Your DOC will be at a maximum point (if you utilize all your aircraft efficiently with less than 1 hour turnaround time remaining), thus allowing your airline's balance to grow quickly.
- With all of your routes at 100% passenger loads, it will then allow your airline to compete well with other airlines that have bigger aircraft fleets or have larger aircraft used for routes that you do, thus allowing you to gain inspiration on "how to outpace the airline that has a lower fare"
It may be ideal for you to keep 100% passenger loads for all routes, but it's also important to consider the number of frequencies you provide per trip because if you increase frequencies without changing prices, the tendency would be passenger loads will be lower because you allocate more seats for your aircraft, thus you have to lower the fares (and as a result, lower DOC).