Believe or disbelieve... but these words are directly from the technical document linked above....

"This revenue earning capability, with high standards of
performance, enables both niche and prime routes to be served.
Longer routes, up to 3,000km, requiring less than 100 seats are
regularly operated with full multi-class service by the Avro RJ."

It does not matter what we think at the end of the day. The FAA, other regulators, and the insurance underwriters will be making the real call here.