If you expect your users to mostly work with both mouse and keyboard, it can make sense. Dropping stuff from the tabbing order means that the stuff left is is quicker to tab through. I find it mostly annoying.

Tap to click, though, that’s infuriating. I don’t know how people can stand it. I know people who insist they like it and then I see them accidentally “click” regularly and get annoyed by it.

No, keeping it disabled makes zero sense. There's no reason now to force people to enable it. Most people don't even know you can do it in windows so it's not like there's a huge problem for them. No reason not to leave it on here.