Formal education for clergy is good and necessary, which can be seen clearly in the relative theological acumen of churches that do and that do not require it, but the self-contained seminary-bubble environment has bred a lot of toxicity over the centuries, and made seemingly unrelated issues like sex abuse harder or even next to impossible to solve. Mixed, better in some denominations than in others.
Basically right and the same opinion I have of fraternities, which are seminaries for consuming rather than making beer.