I'm having trouble understanding the point of White's play in this variation (specifically
[FEN ""] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 d6 5. dxe5!? dxe5 6. Qxd8+ Bxd8
Why does White want to trade queens early, instead of keeping the tension with a move like
5.h3? Also, why does this position have a comparatively high winrate for White (48% / 43% / 9% wins / draws / losses) according to the Lichess Masters db?