Hot take: HTTPS isn't that necessary.
I mean, if you're handling passwords or anything similarly sensitive, it is absolutely necessary. But, like, for a simple, text-and-image-only website, do you really need it? Probably not. It's not the end of the world, put it that way.
This isn't to say that you shouldn't use HTTPS for these sites, mind you. Just that you don't need to, really.