Lots of people will cut and paste passwords and sensitive information while working and swapping back and forth between applications. That would include every sort of personal information possible that can be put into a clipboard.
Having 3rd party tracking services is a bit of a problem with some complex issues, but it's very common. Ad blockers can help, but I suspect the ability for ad blockers to increase privacy is going down. It's easy for sites to configure third party services as though they belong to the site's domain, and all ad blocking goes out the window. This is an arms race that will not end by blocking third party requests.
For first party tracking though, direct tracking by the web site, there is no hard line for what input tracking even means, using the web site at all is a form of input tracking. Logging of inputs to a site by the site should be and always has been expected. Accidentally sending sensitive data directly to a site has always been a problem, and ad blockers don't solve that problem at all.