1. What deductions? I fill out a ton of them every year and they're never more than my standard deduction. Maybe things change as I get older, but in the meantime it seems like a safe default. "Do you want to try and get your taxes lower than $X by filling in a bunch of info? (Y/N)"
2. What am I going to deprecate, my Civic?
3. Despite being in a healthy tax bracket I don't know what this is.
4. See #3
5. Snoozefest
6. Diverse activity?
7. Yeah I think most of your objections apply to the minority of people who actually hire a CPA to do their taxes.
The bottom line is, for the vast majority of people (even people with interesting W2/1099 incomes like me) you could do your taxes on a napkin if you enjoyed a bit of paperwork/math pain. Again: the IRS already has basically all of this info. What gives?