Answer is that it's the human body that's the weakest link here, as muscles get sore and tendons might get damaged if you overdo it.
Prepping for tournaments is a field in and of itself as you need to time your trainings right to achieve peak form at the event itself.
My sister, who's been doing this competitively for a decade now, showed me an excel sheet her team has - there's an optimisation problem you have to solve to get every member to their best shape within the specified timeframe.
Also there are so-called "trads" - people doing traditional archery with period-correct technology, where the stakes are understandably lower.
Also they ingest, ahem, aiming fluid each meeting, so it's way more casual than what modern competitive archers practice.
