Josen had not immediately shared what he knew with the Avengers.
For various reasons, although the Avengers led by the Captain had provisionally accepted his presence, the trust they gave him was limited.
Most of it came from their respect for Josen's strength.
That was only because he had made such a spectacular entrance. If just anyone else had joined, they would long since have been put through the whole personnel process: interrogation, background checks, questioning, observation, a probationary period, and so on!
Make no mistake, Black Widow, who had dealt with countless men, was a top talent in this field.
It was only because Tony Stark was away from home right now. Otherwise, he would already have unleashed his superpower of money and rushed Anti-Superman Armor projects 1.0, 2.0, and 3.0 into development.
After the earlier Serpent S.H.I.E.L.D. incident, the Avengers were no longer the obedient boys who had originally followed Nick Fury's orders.
They had their own structure, organization, teams, funding, and leader. Unconstrained by any individual or official organization, they naturally had their own judgment as well.
Thaddeus Ross, former general, Banner's former father-in-law, and current secretary of state: Goddammit!!
The current Avengers each had eight hundred tricks up their sleeves-excluding a certain Norse god, of course-and naturally were not as easy to fool as when they had first formed.
A certain former God of Hammers: ???
-Was I being naive? I just couldn't be bothered to think when I could fight!
Josen did not expect a mature organization to trust him completely at the drop of a hat, nor was he in the habit of taking charge of every last detail of someone else's affairs.
In any case, there were at least twenty days left before Thanos snapped his fingers to destroy the "Infinity Stones," so