I'd say that definition fits Soft sci-fi more, where science is more of a concept and emphasis is on lifestyle, culture etc.
Hard Sci-fi is .... Sciency. Lots of scientific explanations, theories etc. It's more closer to real life science extrapolating it to future (but not always).
For me, hard sci-fi... is an umbrella term.
If you look at Larry Nivern's
Ringworld; the "Ringworld" is a really important hard sci-fi concept which doesn't really break any known laws of physics (some may disagree but I disagree with the disagreements), but the actual book is set in a soft sci-fi universe with (if memory serves) teleportation, FTL travel and anti-gravity.
The same is true to a slightly less extent, of Iain M Banks
Culture series. The
Orbitals (which are very related to Ringworld) are another hard sci-fi concept that breaks no known law of physics. I.e one day, we can probably build one. And again, the books are set it in a far future space opera universe which is slightly harder than Larry Nivern's Ringworld
Most of
The Expanse is hard sci-fi because they don't have anti-gravity, and they don't have FTL communication. They do have the "Epstein Drive" which is quite literally "science fiction" but because it has defined properties that make sense (literally, you can look up the specific impulse and thrust, etc) it still comes under "hard sci-fi" for me. The Expanse does have some weird shit that is basically magic, but forgetting that, 99% of it is hard sci-fi.
Then there is ultra-hard sci-fi like
The Martian where there is no crazy fake technology, essentially everything in the book/film we could build with known technology (the odd mistake on a Martian storm aside)
Softer "hard sci-fi" would be stuff like Iain M Banks and Adrian Tchaikovsky. I don't want to call it just "soft sci-fi" though because it's still much harder than the Star-Treks and Star-Wars (although actually Star Trek does have the odd bit of hard sci-fi).
You could probably do a tier list.
True Science Sci Fi (breaking no known laws of physics)
Hard Sci Fi (any new science needs to have clearly definable and explainable properties i.e Epstein Drive)
Speculative Sci Fi (Unclear whether sci-fi is realistic due to speculative far-future nature i.e Iain M Banks, Adrian Tchaikovsky)
Space Fantasy (Star Wars, Star Trek)
But much will come under parts i.e. partially hard sci-fi