"is often considered" is a valid and commonly used phrase in written English. It is used to suggest that a certain opinion or belief is widespread or the norm. For example, "The Earth's climate is often considered to be changing at an alarmingly fast rate.".
This tournament is often considered second tier.
Mr. Gephardt is often considered liberal.
Ohio is often considered the great American bellwether state.
It is often considered to be his finest novel.
"Sweeney Todd" is often considered his most operatic work.
He is often considered the greatest American bacteriologist.
Hitting batters repeatedly -- even accidentally -- is often considered grounds for retaliation.
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia