Interesting comment. I agree with you and yet as a developer I've often observed sales staff with extremely flexible working hours, often expensing quite a bit to the company making base salaries as high or higher than devs while getting huge commissions.

And yet I don't really ever observe devs or others suggesting that the sales staff isn't grounded in reality. I honestly don't think the dev team cares and would fully appreciate a salesman who said he would be able to sell better if he slept in till noon.