I now see it is poorly worded, but that interpretation remains wild.
There is a whole section about "Conveying Modified Source Versions". And as Gabe (npub1hk9…xt99) mentioned the preamble clearly states:
"It requires the operator of a network server to provide the source code of the modified version running there to the users of that server. Therefore, public use of a modified version, on a publicly accessible server, gives the public access to the source code of the modified version."
