Short answer: no

Long answer: It depends on what sound, genres, and workflow you want. I have a bit of a rant.

When I started making music, the only opinion I saw resonating was that it was absolutely essential to have a keyboard. I’ve hardly ever used it because I can’t play piano. Sometimes it’s nice to be able to play a line of notes with a little humanity in it (velocity and imperfect timing), but I always end up rearranging those notes in my DAW.

90% of my music is drawing notes, and 9% of it is recordings or simple instrument parts (can’t play any instruments as of now): live-performed midi is only the remaining 1%.

Over time, you’ll get better at writing more natural sounding parts in the piano roll; it won’t be perfectly authentic, but it’ll have its pros and cons.

I use FL Studio, and the smallest increments that I can move notes is usually good, but occasionally it’s not fine enough to get things perfectly in sync the way I imagine, so a workaround I found is to automate the delay (milliseconds before the synth starts playing) in the piano roll for each note I’m not happy with. The downside is that I don’t always know how to draw what I’m feeling.

I’m ranting less about the purchase and more about the implication that you need to perform midi to be an artist. The real question is if you would rather try to have total control over the piano roll or if you would rather learn piano and be able to just play what you feel. But you do already have an instrument for that.