Here we have only two options: either reject Einstein’s statement as invalid, or if we accept it as a valid statement then we have no right to reject those subjective statements given by religious people. If one subjective statement is right, then all the subjective statements are right, provided they stand rational scrutiny.
When Einstein made this statement, perhaps he was not aware that by this he was demolishing the edifice of objective science. He was equating subjective argument with objective argument. The above example shows that this kind of contradiction in thought is widespread amongst scholars, not only among artists but also among scientists.
One can say that in principle, an objective statement and a subjective statement can both be valid statements. The real criterion is whether they stand rational scrutiny or not. If it stands rational scrutiny, the subjective statement is as valid as the objective statement.
This analysis will lead you to believe that the statement of the person was quite rational; consequently, a valid statement. Although in logical categorisation it was a subjective statement—that is, it was not demonstrable objectively.