https://wccftech.com/apples-software-chief-explains-why-the-company-isnt-interested-in-making-a-touchscreen-macbook/

On the subject of a touchscreen-enabled MacBook, Apple does not seem to be thrilled with the idea that you can interact with the notebook via its display. This was exactly the reason why the company introduced the Touch Bar on its 13-inch and 15-inch MacBook Pro models. This time, Craig Federighi, sits with Wired for an interview explaining why Apple is not entertaining the idea of a touchscreen MacBook.

Federighi believes that the way the MacBook has been made for users is such that the only tools you need to interact with the machine are the keyboard and trackpad while resting your hands on the notebook’s surface. He also states that removing your arms from that ergonomic position just to poke the screen is regarded as a tiring thing to do.