When i search compelling in to Russian I get this.
adjective
неотразимый
irresistible, compelling
непреодолимый
irresistible, insurmountable, compelling, insuperable, overwhelming, overpowering.
It's possible it's just down to interpretation.
Choose your adjective ?
The report concludes that whatever happened it was, irresistible, insurmountable, compelling, insuperable, overwhelming, overpowering.
It would be easier if they were hiding something and had control of the investigators , searchers and diaries to say it was the Mansi , weather etc. It would be the easiest thing for them to do , to cover whatever it was, up. They didn't, they basically admit that they don't know. Hence the mystery and speculation.