That’s because you don’t have a basic understanding of language, if you had been exposed to the word intelligence in scientific literature such as biology textbooks then you’d more easily understand what’s being said.
‘Rich in nutrients?! How can a banana be rich when it doesn’t have a job or generational wealth? Makes me so fucking mad when these scientists lie to us!!!’
The comment looks dumb to you because you understand the word ‘rich’ doesn’t only mean having lots of money, you’re used to it in other contexts - likewise if you’d read about animal intelligence and similar subjects then ‘how can you call it intelligence when it does know basic math’ or ‘how is it intelligent when it doesn’t do this thing literally only humans can do’ would sound silly too.