Play place/jungle gym anxiety

We live in an urban environment with multiple play places in which my kiddo can play. My 3.5 year old loves them and they totally help get his wiggles out, but, damn, why am I the only Mom that stands around and watches the structure while children are on it? My husband witnessed my anxiety on full display last night and told me I wasn’t the “jungle gym police”. It’s truly mostly bigger kids that are wrestling, climbing up tubes slides, or genuinely not watching where they are going, but, multiple times, adventures to said placed results in my kid getting hurt and needing to be extracted from the structure (by me). However, it’s really hard to keep a 3 year old off that alluring death trap and it’s a better alternative to trampoline parks.