A lot has been written (and still is) on this hot topic. None I’ve read were anywhere near my full liking.
An individual (and if without proof-reading assistance) may simply too easily miss out on all important points.
a) no breach of the FIDE Laws of Chess, or
b) no breach of any chess event organisers’ related supplementary rules and regulations, or
c) not guided by unethical reasons or any foul-play,
below is my light-shedding root-searching attempt.
Q: In chess, when and why might a quick draw between two players happen?
A1: When at least one of the chess players is genuinely afraid* (for any valid or invalid reason) of any consequences arising from a real possibility of/if losing the game (and with it sometimes some FIDE [international] rating, too).
*Synonyms for afraid:
Fearful, abashed, aghast, alarmed, anxious, apprehensive, aroused, blanched, cowardly, cowed, daunted, discouraged, disheartened, dismayed, distressed, disturbed, faint-hearted, frightened, frozen, have cold feet, horrified, in awe, intimidated, nervous, panic-stricken, perplexed, perturbed, petrified, rattled, run scared, scared, scared stiff, scared to death, shocked, spooked, startled, stunned, suspicious, terrified, terror-stricken, timid, timorous, trembling, upset, and worried.
A2: Force majeure.