My question na goes to, do you believe this set of bitcoin developers don't know who Satoshi be? Em d somehow that none of the core developers of bitcoin no know who Satoshi be. All of them can't accept to work or develop bitcoin for Satoshi without reaching out to him in one way or the other.
Satoshi na person wey dey take privacy very seriously, so he made sure not to lose it before he disappeared from the community. Of course Satoshi go don communicate with some of the developers wey help am wella, but him go fit do that without losing him privacy na, even the admin of this forum fit read Satoshi PM's wey him been send when he was a user here, but you cannot use any of that to determine who the creator of Bitcoin be. If person bring interesting proposal to you through the internet, but the person no wan tell you about their identity, if you like the project, nothing concern you with their identity, you go just lend your own support.
In addition to what Coyster said so, in order to reach you don't necessarily need to meet the person first to first and why these devs choose to support in the development of Bitcoin was because they saw the potential of Bitcoin, don't forget before the invention of bitcoin there have been already been alot of people trying to find a way of solving the double spending problem in Blockchain technology which Satoshi did with the proof of work mechanism in the creation of bitcoin.
So these devs never needed to see him all that matters was that, Is idea for solving such problem seems logically possible and so they supported and now we have Bitcoin.
Aside the core dev there have been alot of individuals who have supported the growth of Bitcoin but have never even gotten any personal message from him but still continue because they believe in bitcoin.
Even Hal Finney who was among the core dev and he was the first to receive bitcoin which he did receive from Satoshi, didn't know him though they both have conversations online when he was testing how the Bitcoin Network works never knew him directly rather everything he guessed the things he knew about him, like being a Japanese from the way he (Satoshi) wrote, here is Bitcoin story of Hal Finney
Bitcoin and me (Hal Finney)