Could've been for various possible reasons.
1. A very bad wallet fee recommendation
2. A transaction that consists of a huge amount of bitcoin(e.g. an internal exchange hot<->cold wallet transaction)
3. Some dude that says "fuck it" and just wants to dump his/her bitcoin literally ASAP
#2. The amount being bigger doesn't warrant paying higher fee.
#1 +
4. Services such as exchanges or gambling sites that have bad code that is intentionally set to pay a higher fee so that they don't risk getting their transaction stuck and be flooded with complaints.
5. Unpopular terrible wallets created by stupid developers who use malicious centralized tools that intentionally report extremely higher fees. For example right now that worst case scenario is 1 to 10 satoshi/vbyte but the malicious site known as bitcoinfees.earn.com is suggesting 102 sat/byte!!!