"it can be objected" is a correct and usable idiom in written English.
You can use this phrase to introduce an opposing opinion or to indicate that criticism of an idea or proposal is possible. For example: "It can be objected that this approach is too costly, but when the long-term benefits are considered, it is clear that it is a worthwhile investment."
It can be objected that the synchronization stems from the simplicity of scenarios offering a binary choice.
It can be objected also that the second act, though scenically splendid, often goes astray as Wagnerian theater.
It can be objected that I am speaking of political freedom in spiritual terms, but the political institutions of any nation are always menaced and are ultimately controlled by the spiritual state of that nation.
It can be objected, however, that the defense of individual liberty provided by perfectionist liberalism is insufficient.
On the other hand it can be objected that unless a calculation is carried out with professional care then it can not only be meaningless but seriously misleading.
Now, it can be objected that voices are but a part of the auditory world, and they are the object of dedicated neural machinery.
There is compelling evidence that attention can be object based, which means that it can be directed selectively to an object that overlaps with another object (Behrmann et al., 1998; Blaser, Pylyshyn, & Holcombe, 2000; Duncan, 1984; O'Craven, Downing, & Kanwisher, 1999; Scholl, 2001; Watson & Kramer, 1999).
It can reasonably be objected that the relatives of current or past hostages can not be expected to relish Kureishi's handling of metaphor and irony.
It can always be objected that there are loftier, graver pursuits than boozing and carousing, and that overindulgence can be injurious to health, morals and the feelings of others.
It can also be objected that many understanding listeners are not moved to respond emotionally to music.
Against empiricism, however, he argues that no object is simply "given" either, both because it can be an object only in relation to a subject and because objects are historical and have the potential to change.
