Every bank application I've done has required print + sign + scanned, I got refused when I tried sending them PDFs signed in Preview/Acrobat
For example, even just assigning everybody unique identifiers (social security number, drivers' license number) has allowed businesses to demand these identifiers to track customers in privately-held surveillance databases. This system has already grown out of control with little sign of stopping.
A "secure" e-signature token would lead to even more businesses demanding your "identity". Imagine having to pay twice as much for groceries for wanting to keep your purchases personal!
I'd much rather suffer the small work of (print, sign, scan, cache, burn) until I see some reigning in of private surveillance databases.
The federal government refuses to issue actual public IDs, which would solve the problem nicely, for political reasons. They can't retract Social Security.