For me personally as a reader, I don't mind at all if comics have sporadic updates. People have lives and I understand that they can't always get around to creating. That or, I understand sometimes ideas don't come until certain moments. I'd rather have a story that was made for the sake of creativity than a deadline. Even if the artist is inactive on social media or they're not trying to be a presence, I don't care. For me all I look for is a story that was made with passion and heart; everything else doesn't matter.
With that being said as a creator, I think it's important to try to adhere to a schedule, especially if you want to make it a career, if you expect to gain a following, and if you expect the story to get done. Realistically, if you want to make creating a source of money or your job, it has to be treated like a job in some way. You have to be willing to push yourself and to be passionate enough to get the story out there. It's all about balancing your life with how fast you can create. Even if a story has a schedule of posting once a year, that's better than having no schedule.
Overall I'd say, I have a schedule, and it's nice when a comic I like uploads on one, but I wouldn't expect anyone to sacrifice creativity for that schedule.