Must use digital signature instead of less secure method?

[Guest]

I combined a word doc and a fillable PDF form that required a digital signature. I circumnavigated the "turn them into a portfolio" option and combined them as one single PDF. I needed to sign in two places. However, the only signing option I had was the digital signature as opposed to the "less secure" click on the ink pen icon and affix a signature method.  I wanted to use the "less secure method." Anyone know why Adobe DC would not allow me to do so?