I am also an expert player, and agree with most of what was said, but I do think I should point out that this player's style is not the only strategy ("My strategy is usually to throw lots of pieces at their king and hope they die or I can win some material"). Personally, I prefer more closed/quite games, so most of my thinking (even in the middle game) is about how to achieve a favorable endgame, and win from there.

EDIT: I dislike studying openings too, (I started playing 1. g3 to avoid theory while still getting into some fun positions)