The phrase "are often incapable" is correct and usable in written English.
It can be used to describe a frequent inability or lack of capacity in a particular context or situation.
Example: "Many individuals in high-stress environments are often incapable of making rational decisions."
Alternatives: "frequently unable" or "often not able".
As Judge Lippman has pointed out, treating adolescents as adults is both counterproductive and morally unjustified, given brain science showing that teenagers are often incapable of the judgments of adults.
Shuttle vans and even buses are often incapable of fitting the poles, so most of the time, vaulters must strap their poles to the roofs — or other parts — of their cars.
He had glimpsed the essential truth of the market: that even people who called themselves professionals are often incapable of independent thought and that most people, though obsessed with money, have little ability to make decisions about it.
In a series of tests, Sinclair showed that the digital television receivers that are now on the market are often incapable of receiving an acceptable television picture if the receiving antenna is not within a direct line of sight of the transmitting antenna.
Indeed, in "Ethics and the Limits of Philosophy" (1985), considered his best book, he argued that ethical concepts are so embedded in history that they are often incapable of being shared by subsequent cultures, although they can be understood to some extent through study, and he held that the simple goals of truth were worth pursuing.
Conventional classification methods such as Supervised and Unsupervised classification techniques are often incapable of performing satisfactorily in the presence of mixed pixels, the pixels which are not completely occupied by a single homogeneous category.
It's often incapable of even opening, victim of developer Niantic's inability to meet server demand.
Pellegrini can boast the third best win ratio in the Premier League era – behind just Mourinho and former Manchester United manager Sir Alex Ferguson – and offers clubs a brand of off-field tranquillity of which Mourinho is often incapable.
A half-starved Highland woman frequently bears more than twenty children, while a pampered fine lady is often incapable of bearing any, and is generally exhausted by two or three.
In that floor statement, she said the United Nations was often incapable of backing up its words with action, that a single Security Council member could veto any resolution and that the body usually waited to act until it was too late.
As a documentary, this is courageous enough to do what online discussion is often incapable of: explore the subtleties that get lost in the vicious polemics that can dominate the public reporting of such stories.
