I just checked and it's now 6 reasons rather than 4 but the point stands. These are the reasons to leave home:

* Shopping for necessary goods and services

* Caregiving or medical care

* Authorised work or education

* Exercise (limit of 4 hours a day)

* Social interaction (included in the same 4 hour limit above)

* To get a vaccination

As you will see protest is not a permitted reason to leave home.

Even if a protest of 10 people was permitted that's not a serious argument. Basically all protests aim for strength in numbers.