Why are Catholics cut off from the truth for listening to one guy, but Protestants have no problem listening to thirty that don't agree with each other?
From on of your own: 12 Ways For a Catholic to Stay Calm & Not Freak Out Every Time Pope Francis Speaks Besides the definition of "Protestant" being so broad as to essentially be meaningless, the reality is that, beyond the limited and largely paper unity of Catholicism, it is a amalgamation of variant beliefs, as RCs can and do engage in interpretation of their supreme source, including what magisterial level teachings, or aspects them, fall under, and thus what level of assent is required, as well as the meaning of them to varying degrees.
Moreover, what one effects and does is what constitutes the evidence of what one believes, (Ja. 2:18) and liberalism predominates where Catholicism does in contrast to evangelicals, which are yet the most unified (in conservative beliefs) significant religious group, much in contrast to those Rome counts and treats as members in life and in death.
Christians get their truth from Scripture, the God breathed, Holy Spirit inspired word of God.
They don't count on men to get truth from them because they know that humans are fallible.