I am Protestant, baptized and raised, but I do not ever hear about Protestant pastors driving out demons in exorcisms. We know the spiritual world is real, so exorcisms have to be real by default. Demons can call out our sins to accuse us and drag us down with them, so that is also universal between Catholics and Protestants.
So what is the defining difference that gives Catholics the power to do the exorcisms and not Protestants?
Do they teach in a way that gives more divine authority? Are we doing something wrong? Or is it withholding information within the Catholic church?
Neither is necessary to meet with a congregation. Forget the building if need be, but don’t throw out the assembly.
Hebrews 10:25 in particular, as was pointed out - 24 Let us consider how to provoke one another to love and good works, 25 not forsaking our own assembling together, as the custom of some is, but exhorting one another; and so much the more, as you see the Day approaching.
I don’t believe in denominations myself, nor that “weekly sermon attendance” is necessary (though I do try to do so regularly), but the “good works” and “assembly” parts should not be neglected. We had a group who left our church to begin regular home-based worship/study.
One of the points of the crucifixion, imho, was the removal of the required central earthly authority.