This isn’t really true. It’s kind of true for scientists because by their nature, they work on discovering new things, but even still, the amount we know and understand about say, physics and chemistry, is way way way greater than biology.
Like for physics and chemistry we have a very rock solid understanding of how the vast majority of reactions and interactions that effect the universe at our scale, work. Most of what physicists and chemists are learning these days is at the outer edges of what’s physically possible or studying, there’s very few questions left about common, day to day reactions, those are so well understood that they’re considered engineering and not science anymore.
But that’s not the case for biology. We still don’t understand very basic elementary things about the human body and what parts of it even do, let alone the wider, non human biological world. There is truly more unknowns in biology than the other sciences.
Yeah, I’m not talking about developing new computer technologies as utter bullshit, I’m talking about the trillions spent on advertising for instance, or social media platforms.