Is it better to use a guitar pick or not?
Playing with a pick (or plectrum) is especially useful when playing lots of notes fast. Rock and metal riffs and solos are usually played using a pick. ... Strumming chords on a steel-string guitar tends to be richer with a pick, and you get a louder volume in general.
Why can't I use a guitar pick?
You can't do that with a pick and keep good consistency and control. The further away from the strings, the more difficult you make it. Strumming with fingers forces you to keep the hand close to the strings. I find when I do it I tend you use the wrist more, as my fingers cover more ground than a pick, so I move less.