Would music get robotic with the aid of a metronome? The answer is this: it depends on how the music gets arranged!
While there are pitfalls to the use of technology in making music, time evolved. I know someone conservative who is likes the natural flow of imperfection in music, without using the metronome.
In the meantime, I'll talk about exploiting the use of a metronome to an advantage.
There are old music files where I have intact tracks, preserved for some years. For example, my song "Close to Me" was salvaged from my past recording. I don't like the instrumentation anymore, so I revamped it all, recorded new guitar tracks, nylon panned to the left and string panned to the right, slapped in new percussion beats, used the old recorded vocals, then viola! The music gets done. It's one of my re-makes when I abandoned my old DAW and shifted to a new one. What kept me in sync all the while is the Morse code of beats, this rigid blitz called a metronome!
Of course, if the music has no fixed beats per minute (bpm), it could still get completed. But there is this intact and organized feel in using it.
I know some who still don't employ the use of a metronome. But as a solo DIY musician, I prefer to depend on it in my output because it is easy to get back to the tracks as I jump from one file to another.
And last but not the least, metronome is very useful in practicing scales and licks. It gives each second a disciplined deadline beat after beat.
How about you, are you savvy with the use of a metronome?
(Wait! I could almost overhear pandemonium from somewhere: "A metronome... What's that again?" Okay, here is a link, in case you need a reading about metronome on Britannica and Wikipedia: https://en.wikipedia.org/wiki/Metronome