> If they offer symmetric speeds to home users, they worry that business customers will try to switch to residential plans in order to save money.
If their key differentiator between the two connection types are upload speeds then they should adjust the pricing and/or clarify (or actually add some) the value add for the business line. That is just unfortunate
It is done for market segmentation purposes, not because there is a technical requirement for it. Asymmetric vs symmetric is used to separate residential from business customers, and charge the later category higher prices.
If they offer symmetric speeds to home users, they worry that business customers will try to switch to residential plans in order to save money.