I've personally practiced to "metadones" and click tracks live and in the studio for years, and worked with drummers who use clicks so as to stay synchronized to other things outside the band. It's not a problem for most if they practice. But some people have more trouble playing in time than others.
I remember an instance about 25 years ago, and I was studying with a jazz saxophonist (I'm a bass player), and I was playing some modal scales with a click because we were trying to achieve a certain velocity. When I finished the exercise, my teacher shook his head and said, "Man, you played that and stayed right with the metronome the whole time!". I was surprised, and asked if that wasn't the case with everyone, and that's when he told me that a very large number of musicians have trouble matching time with a click and staying consistent. Since then, I've come to realize, to a much smaller degree, it's a gift, just like some people are born with perfect pitch memory, (not me). But one can practice and develop a very useful sense of relative pitch (like me), just like one can practice and become BETTER at playing steady at any tempo.
I played with a drummer earlier today who was using a metronome, and we had no problem playing three different tunes all at different tempos and grooves, but then again, I don't think the band was tugging the drummer out of his pocket. And I'll do a couple live shows this weekend with a different drummer, and he'll be playing all but one or two of the tunes to a click part that was recorded for each individual song, and we'll all groove hard, like we have for over ten years together, backing this particular artist, and everyone will go home happy.
Being able to play steady to a click and still be musical is part gift, but more it's a learned skill.
(If you don't like playing to a click, you'd hate working in Nashville!!)