There are basically ZERO jobs that don't involve mostly grinding.
Even the most creative jobs - like author, painter, composer, athlete - do you realize they are just as much of a 'grind'? Authors wake up at 7 am, sit down and force themselves to bang out 1000 words a day - often if they don't, there's no book. Do you think it's enjoyable every day? No - it's work.
Bach wrote a piece for almost every day of his life. Quincy Jones spent all day every day for decades arranging and arranging music. You don't think he found that tedious quite often?
Professional composers will tell younger aspirational composers that they need to learn to work quickly and bang stuff out, or it's not going to work.
Do you think pro baseball players, who play a game every day for 3/4 of a year, for 20 years straight are 'in the zone' every day? Or maybe it's a grind for them as well?
That said, your lack of motivation might flip when you start working and you can see the material impact of what you call 'tedious work'.
Uni work assignments are not busywork, and I suggest strongly that if you're not doing most of the work, that you're not getting the most out of the experience. Those assignments help you internalize the knowledge in a better way than otherwise. And your professors may seem bored but hey, they have more interesting things to do like their own research. 'Teaching' is a secondary function of Profs. Many of them hate it.
If you are there simply to 'ascertain some knowledge' then maybe you should do an online U, or skip Uni and just read some texts. I'd advise against it.
Your perspective will change as you enter the workforce, have a career for some period, do a lot of hiring, and especially get exposed to Uni recruitment.
I would advise any University student (even my younger self) that if they enjoy the subject material at all, or if they have any affinity for it ... then 'that's as good as it gets' and to just do the work and move through it. You will get a lot out of it, and be a better person for it ... it may not seem like it right now, but it will with hindsight.