The point is that Italy's bond yield - the implicit interest rate it pays - is unlikely to fall decisively below the catastrophically unaffordable 7% unless and until the eurozone demonstrates that there is a bailout facility (of some sort) that has sufficient resources to lend to Italy if investors refuse to do so.
To make money for themselves they reach for yield by lending to more speculative borrowers whom they can charge more interest to, and they too often lend to high interest paying governments whose junkie bonds they buy for a fat yield as well as their implicit security.