Rentahamster
Rodent Whores
What technical jargon was in interstellar? If anything, that film needed MORE science, or at least a guy to say things like "hey, due to gravitational time dilation every minute you spend down there is like a year up here, so this planet is totally unsuitable for colonization no matter how much of an eden it might be but hey I can see here with my telescope that the entire planet is a flat sea with no land masses, ANOTHER reason why it's a shit planet. And wow this other report we got is from a planet with a negative 150 Celsius average temp, so his reports seem really off, perhaps we can consider reasons why he might be fabricating false info?" Stuff like that.
The technical aspects of the science fact and science fiction related concepts are very closely related to the core drivers of the plot. For example, in Interstellar, you need to have a somewhat basic understanding of the concepts of general relativity in order to grasp the urgency for why/how/when they're doing some of the things they're doing to drive the plot along. In Project Hail Mary, special relativity is important to certain aspects of the world building and character development, but you don't need to know what it is in order to follow along. But, if you do, the movie becomes that much more rich and interesting.
Interstellar very much needs to be a sci-fi movie. Project Hail Mary's entire genre and setting could be switched to fantasy, but the core aspects of needing to save the world via means of Macguffin A and being helped by unlikely partner B would be largely unchanged.
Let me put it this way - I've watched Interstellar in English (no subtitles) with people who were not native language English speakers and they had a hard time following along, which hampered their enjoyment of the movie. I saw PHM with a non-native English speaker and she followed along just fine and loved the movie.