Well, it is and it isn't.
Maybe you've had a summer job. It's not like that.
Maybe you've had a routine or boring job. It's not like that.
Maybe you've been a resident physician in a busy hospital. It's not like that, either.
The summer job ends in 10 weeks. Usually, it doesn't require much deep thinking, or more than 40 hours per week. Often, the college kid who is law school bound is the smartest one in the crew. (Well, at least "book-learnin'" smart.)
If you had routine or boring jobs, that's probably one of the reasons you chose to go to law school. If you're bored or into a routine at law school, you are not working at anywhere near your highest level.
But the resident? She's a graduate of medical school, an extraordinarily tough curriculum. And now she works something like 80 hours a week under the supervision of (thank goodness) unforgiving supervising experienced physicians. If you feel like your law school experience is in that ball park, you're doing something wrong. You ought to be spending no more than (roughly) 65 hours per week exclusively devoted to law school during your all-important first year. And as for supervision? You are on your own.
The "job" law school is like is ... the profession of practicing law. You'll find lots of information about that concept on these web pages. That's the whole foundation of the material in 1000 Days to the Bar - But the Practice of Law Begins Now. In that sense, and in only that sense, yes ... law school is like a job.