The best thing to do is build the communities here that you are interested in. Do what you can to make them lively and active.
The question as ever remains, though, how does one go about this without coming across poorly? That's always the tricky part of trying to form new groups and communities, because it's not quite marketing but it's in a similar vein to get things going, and it more often than not reads as at best mildly uninteresting or at worst offputting and annoying.
No, but the options are defeatist because they reflect my feelings related to the broad design trends of phones being bigger, and my preference for handling a phone one-handed. For me personally, it's caving in (and frankly just clumsy feeling) to have to use both hands to handle phones (in portrait orientation) that are in a weird size range that's almost too big but not so much so that they're no longer portable.
Also in my opinion while it's absolutely not a personal failure to use an accessory to help handle larger phones, it simply is a design failure. It's like having to put a label on a door to tell people how to open it, that's courtesy of a design failure that made opening the door ambiguous.
Anyway, 6.5" is a large phone to me, so that being a "standard" is why the phrasing is so defeatist. You're stuck in an awkward compromise if you want a device capable and comfortable: get some less powerful but smaller option (e.g. Jelly), or something that even on the smaller end is still relatively large (e.g. Zenfone 8/9).