So instead of accepting a intersection G departure from 16R at YSSY which would give you 2800+ meters you would prefer the full 3962m?
I know this is an extreme example, but sometimes an intersection departure is not a problem
It's up to you to use your piloting skills to see if it will work for you.
The chart for my A/C says I need 450m ground roll for max weight at 5000ft and 25 degrees. I personally want 1000m for the same conditions. If an intersection departure meets that personal requirement I will consider it, if it doesn't I won't.