Could this be due to the rise of pure mathematics in influencing philosophers? In pure math, counter examples play a very important role: show once counter example, disprove an entire claim.
The violinist in the article is clearly trying to be a pure math- like counter example, but to me, misses the emotional aspect of pregnancy (at the least) - a fetus is not a random person, it is you (partly), and furthermore, many would say society (and the species) depend on having babies, whereas the society and the species do not depend on violin players.
Not saying I agree with these arguments only that the real world is substantially messier than pure math, and thus, pure math thinking may stumble when applied to real world problems.
Tl;dr: humans are not rational in our beliefs and the continued attempts on all disciplines to assume we are, are well, irrational.