We need a more nuanced conversation that "spying tools".

Developers creating software should see that 80% of people can't finish filling in a form or that 80% of people click on something that isn't supposed to be clickable. That way they can identify UX bugs and improve the product.

Sure, asking users to opt-in to telemetry for improving the product is a best practice.

Are developers trying to improve the product, or are you just collecting data to sell to 3rd parties? Big difference.