The usual counterpoint to that is that for highly skilled work 95% of what you do can be done by someone else who takes 1/2 to 2/3 your salary and it's the last

The usual counterpoint to that is that for highly skilled work 95% of what you do can be done by someone else who takes 1/2 to 2/3 your salary and it's the last 5% that you're actually being paid the big bucks for. This is stuff that you have to do rarely but it brings a lot of value; whether you have 5 days every week or 4 days every week to get that out of the way doesn't matter, because you do it for a couple hours a week at most.