I just saw Walnut.io [1] demo for another product today. I skipped through most of the demo, did not really understand anything about the product. I think it is not the tool but really depends on who and how these product tours are built.

I can imagine some products are complex and needs explanation or hand holding by solution engineers, account managers etc. No product ever is so amazing that you don't need help or product tours.

[1] https://walnut.io