So you have a big inflatable bouncy under each tree just in case somebody falls out? Or maybe you build a scaffolding around the tree to hook into before starting work? Cut everything with a butter knife because that would be safer than a chainsaw? Only work for 2 hours at a time to avoid fatigue? The other 30 hours per week are at safety trainings (of course, can't go over 40 hours...that is too much stress). Never go out if the temp is over 83 degrees or below 32? Only work between 8-10 a.m. and 3-6 p.m. to avoid the harmful skin cancer-causing sun of mid-day?
Can't put a price on safety - right? So why not?
Not disagreeing that safety must be first and foremost...and even that the attitude of 'can't put a price on safety' is a good attitude to have. But to suggest there is no such no price too high is foolish. Of course we must find that balance. If you aren't having "predictable" accidents/injuries and are profitable, you have hit the nail on the head! If somebody can't figure out how to do both, maybe they should let someone else better run the show.
Though, now that I think about it...if you don't turn a profit, you will be safe from the dangers of tree work real quick - so maybe that is the best approach
(and reading back to where this started...I'll agree that $650 is not too high of a price for something that can make that big of a difference every day - good communication is one of the best ways to stay safe. So I am not totally disagreeing with you!)