If it's more fair to tax profits than revenues, we should be advocating for individuals to be treated in the more fair way, rather than advocating for corporations to be treated in the less fair way, don't you think?

Besides, corporations generally have outside sources of funding other than income, while people generally don't. Thus corporations can run at a deficit, sometimes for a long time, while they figure out how to turn a profit. Do you think there's really a societal benefit to drive new businesses into bankruptcy before they get their footing by taxing them while they're losing money?

One way to look at it is that all corporate income is ‘capital gains’, and taxed more like capital gains than wage income.

Your personal income is for yourself. A corporation's revenue that goes towards expenses is for the customer. Say you buy a gold at $700, and turn it into gold jewelry that you sell it for a $1000. If the tax rate is 30%, and the jeweler is taxed on the revenue, the jeweler would have made no money at all! If you do tax the expenses, it would have to be passed straight to the consumer.