Perhaps this is like the issue of someone else parking their car right in front of your house all the time. It's legal, there's nothing in etiquette against it, but it just doesn't feel right. It's annoying and irritating. It can feel like an invasion of your space, even though technically, the car isn't in your space. It just feels that way.
I totally get this.
My neighbours seem to have lots of company. There isn't a problem with noise or behaviour, everything is very civil. Absolutely no complaints on that score.
The guests tend to park in front of our hose ( actually, in front of our shared front yard).
Sometimes, they are annoyingly close to our driveway and we have to angle a bit to get out, but that situation is so uncommon that it's not worth bringing up. (Once a year, if that.)
We have three cars (6 people, all working, one also at school.) One of our cars has to park on the street.
It would be much easier for us if we could sometimes use that space. Easier, but we are not entitled to it.
It would be especially useful on garbage day. Every house has two (city provided) bins and these must be placed 1 meter apart and 1 meter from the curb and any vehicles.. If we are in one street spot, and there is a guest on the other, the only clear space is directly behind our cars. So we have to shuffle them around to get to work in the morning.
It's just the reality of the layout, and it doesn't seem reasonable to insist we get that space so as to make one day a week more convenient for us.
Overall, there is an unreasonable, vaguely annoying sense that we can't use the space as we'd prefer because someone else is using it. I *know* we have no entitlement to the curb spot in front of our house. It still feels like it's "ours" and we should have a say in it's use.