A consumer laptop targets the average consumer who probably doesn’t do anything interesting or important with their laptop. If it isn’t working quite right, it doesn’t matter, the consumer would rather pay less for a device that they don’t use intensively.
A business laptop targets businesses. They are more expensive, but higher quality, more reliable, and more durable. Every hour wasted by an employee screwing with a cheap, unreliable laptop isn’t just a waste of time, it’s now a waste of money. Money to pay the employee, and possibly the IT gal. The extra reliability of a business laptop is worth it for the business, because in the end it saves money.