The fenix series is a high end tool meant for serious backcountry use. The ratio of price to utility is actually really good when you compare it to other outdoor equipment. You could spend that much on ski bindings[0]. Not skis, literally just the bindings.
If you just want a smart watch for training then a Forerunner 235 would work fine.
Though even as someone who spends 40+ days/year in the backcountry skiing around the PNW, the 645m is plenty for me. That, combined with an inReach Mini incase shit hits the fan and I feel pretty well covered.
As a side note, those bindings are incredible. Easily one of the biggest innovation in skiing since shaped skis. I put 30 days on mine last season and didn't have a single issue; really impressive for a lightweight, finicky, and brand-new piece of gear.
If you just want a smart watch for training then a Forerunner 235 would work fine.
[0]: https://www.rei.com/product/140950/salomon-slab-shift-mnc-sk...