There's a scene in HBO's Westworld which revolves around this.
"My father used to say that only boring people get bored [...] I used to think it's only boring people who don't feel boredom, or cannot conceive of it in others."
I personally like the idea that only boring people can't conceive of boredom.
Neither boredom nor never being bored is a sign of a boring personality. But for me, the spirit of OP's quote is that if you're intellectually curious, you can almost always find something to explore - the systems around you, the natural environment, getting to know ordinary people, examining and classifying materials, describing your lack of stimulation poetically...And that's a good attitude to cultivate. You'll still probably get bored occasionally; it's a part of life.
In fact I would argue that from boredom have come many of my best moments. Where you can't think of anything to do, so working on crazy projects you wouldn't normally consider or exploring round the next corner just to see what's there.
In a way, i'm thankful for boredom
"My father used to say that only boring people get bored [...] I used to think it's only boring people who don't feel boredom, or cannot conceive of it in others."
I personally like the idea that only boring people can't conceive of boredom.