Discussing nominal profits when comparing various businesses' "profitability" is almost never productive.
Any business needs a certain amount of cushion to counter volatility, and to earn a return for shareholders. If you had a business with $1M of revenue and $20k of profit, surely you would not expect $20k of profit when you hit $2M of revenue (because 2% profit margin is objectively very low. I have yet to see of successful businesses operate year after year on less than that, and at 0% they become a charity).
Hence profit margin is almost always the relevant figure, especially when you get down to the low single digit percentages.
This is like saying walmart isn't highly profitable...you make up for it in volume.