You’re either a true, orthodox catholic or not. There’s no such thing as a sedevacantist Catholic vs Benevacantist Catholic. You’re wrong mindset is slicing up Catholicism into different groups, with different beliefs. It’s not catholic thinking.
There is one True Faith, but these factions exist. It is not a matter of right or wrong mindset. It's realism. It is a sad thing. Scripture warns against useless factions. Yet among tradition, there's so many factions. The SSPX of Archbishop Lefebvre has (outside those within formal Conciliar structures) the Menzingen SSPX, SSPX Resistance, the Pfeifferite SSPX Resistance, SSPV, who are at least sedeprivationist and so on. The SSPV dispute the orders of the CMRI and the Thuc line, another notable sede community, with Saint Gertrude the Great of Fr Cekaka RIP, one of many independent chapels. Sedeprivationists are represented by the Institute of the Mother of God Counsel of +Guerard des Lauriers, another SSPX expellee. There is also indult societies, there is first of all the FSSP, Institute of Christ the King Sovereign Priest, the Personal Prelature of St John Vianney, Institute of the Good Shepherd, and many, many others. When Benedict dies, unless somehow Francis is not followed by someone as unseemly and impious, a lot of people will have to decide if the Seat is empty.
Anyhow, Benevacantist might be a goofy neologism, but it reflects a position where many are just about connected to what emerged after V2 by enfeebled +Ratzinger, who actually tried to clear out the pantheistic aspect of Assisi, if not its ecuмenical aspect. His effort to reconcile V2 and Catholic tradition were sincere, but appear to have failed.
Anne Barnhardt and
Br Alex Bugnolo are two well known examples of those connected to Conciliarism by just Benedict. Benevacantism is at least a shorthand for that.