They don’t like to land with a full load of fuel, apparently.
No, they don't. Max takeoff weight for many commercial airliners is greater than max landing weight. Fuel is heavy.
“ They don’t like to land with a full load of fuel, apparently.”
I believe it has to do with preparing to crash in case the gear doesn’t work. Fuel tends to explode
That would put the plane above the Maximum Landing Weight (MLW).
There are take off weight limits AND landing weight limits. Just because it could take off with that weight doesn’t mean they can safely land with it. (Usually landing gear concerns)
Key word “safely”.
Also, they would use the time dumping fuel to assess their situation, go through various check lists and prepare for a non-standard (emergency) landing.