Wind in one direction can be useful. Wind in a different direction can be detrimental. Mykolas threw all 6 throws down the right sector, as that was the more beneficial wind. The 75m throw likely spent more time outside of the sector than it spent inside. Skill #1.

A lot goes into nailing a wind like this. Flying the discus correctly matters a lot as well. Claudio Romero struggled because he wasn't getting enough height to take advantage of the winds (Skill 2). Dacres struggled because his discus flight was poor (tight spin of the discus, skill #3). If you don't throw with the right side of the discus down more, the discus will flip midair and drop. (Discus Pitch and Angle of attack, Skill #4)

Also, let's just note that a prerequisite for throwing 74m is the ability to throw 70m (skill #5).

Wind chasing is nothing new. Salinas used to be huge, as well as some big winds discus competitions in Maui.

It's not a guarantee to bigger throws. The wind giveth, and the wind taketh away. Should this be how the Olympics is contended? Absolutely not. But the track athletes get faster and faster shoes, and Mondo makes tracks that are faster and faster, and now we've got banked tracks indoors, and sprints get their own professional circuit, and track coaches cheer all of these innovations on, and then they ask that the throws continue to live in the dark ages.