I guess it depends on your definition of "too much", but also on your definition of "thinking".
What I've found is that LLMs are excellent tools for:
- Spitting out white collar corporate speak that sounds plausible to other corporate speakers
- Hugely accelerating the process of going through academia which, except for a few specific cases, is essentially years of copy/pasting
- Writing code as long as such code as been written many times before
- Figuring out which one of the 10 ads and 12 misleading links in a web search is the one you're looking for
- Summarizing a book in ten paragraphs so you don't have to read it
...which turns out a lot of people defined as "thinking". I don't agree with that. But in either case, not "too much" is being offloaded: it's all of it.