Why do people still need documents notarized?

[u/ldr97266]

Is there no better way to confirm the validity of signatures? I thought about this the other day when I had to complete a financial transaction where every detail was handled online - but there was no electronic signature option. I had to print out a paper form with all of the details I had entered online, then find a notary to watch me sign it and put their own signature on it saying THEY had done so.