I think the writer’s points are excellent, though he is obviously not talking to everyone. If you know you are going to be in chinuch, and you won’t need a degree of any sort AND your rebbi tells you to sit and learn all day, that’s one thing.
But if you’re simply going to Yeshiva, do not have a plan to go into avodas hakodesh, and have no clue how you’ll support your family after you get married, you are probably very well advised, with the personal advice of your rebbi, to obtain at leaat a bachelor’s degree, or do a BTL/masters in whatever, as this is a basic hishtadlus (though only Hashem can guarantee) in being able to support a family, BE”H.