This is not correct. These were not theatrical releases. They were made specifically for television, and then later released through home video. First VHS, and then DVD. I think it may even be available on Blu-ray. I'll need to double-check on that.
EDIT: No for blu-ray. And a single DVD was released back in 2004 as a double-feature for both Ewok movies.
That doesn't mean it has never been shown in a theater somewhere, but theater technology at the time it was made didn't allow for projecting media from VHS or TV broadcasts. It had to be distributed as film reels, which it was not.
Interestingly, the ewok shows were handled by Lucas directly after the embarrassment of the Holiday Special that was produced by studio executives who believed variety shows were the magic formula for everything. It was a hard lesson for George who grew distrustful of anyone else handling his creations.
Anyway, I don't think the topic specified theatrical releases (though it may have been implied). But I believe the vast majority is unfamiliar with anything beyond the major movies. Fortunately, they aren't missing anything special about these made for tv films.
But I would submit that Star Wars Rebels offers one of the most satisfying experiences yet. It bridges that original trilogy feel with clone wars style sequences and intrigue. The characters are well developed and constantly growing throughout the entire four season run. The storylines add greater depth and comprehension to the larger story while staying focused on the characters who have their own saga which neatly intersects in interesting places. Hands down, one of my all-time favorites and a great reference for the way I structure my own Star Wars games.