My school is banning our Grading Portal during the School Day Starting next week. How is that fair!?

Both parents and students are unable to access the grading portal throughout the school day starting next week (for semester 2). This is due to parents and kids apparently checking their grades too often (I do this too), and as a result, students will "beg" teachers to raise their grades or ask for some extra credit oppourtunities. Also, students compare grades, which even with this "ban" they will literally just compare outside of school.

They are putting this reason as to not cause stress on the students. THIS CAUSES MORE STRESS LIKE MY TEACHERS SAY THEY PUT A GRADE INTO THE GRADEBOOK AND I HAVE TO WAIT TILL 4PM (Our school ends at 3pm...) LIKE THAT IS NOT FAIR....

The real reason is that teachers hate being asked for students to get their grade up (since our school, despite not being in the top 100 schools, really cares about getting all As). That's understandable sure... but this is a bit much - for ppl like me this will only make my stress worse since I REALLY stress over grades (ik im trying to not stress over it as much)

Do you guys agree with my stance... or my school that makes sense?