The problem with the current tide of queer community "ace acceptance" is that allos think that aphobia is just saying glaringly hateful shit, and refuse to acknowledge that they're performing aphobic microaggressions all the time.
They still agree with/reblog aphobic posts and sentiments, actively ignore or "forget" about ace people in queer conversations, make sweeping statements and generalizations that leave aces out or vilify us, and actively create spaces where we are pushed out and made unwelcome, but they don't consider themselves "aphobic".
They'll see an "aces belong in the queer community" post and nod their heads and go "sure, of course" and continue on with their day, confident that they're Not Aphobic. And then giggle and reblog an amatonormative or sex-compulsory post written by an aphobe 20 minutes later.
The queer community has simplified aphobia down to "a teen who makes a tumblr blog about how much they hate ace people". This shallow understanding of the types of microaggressions ace people face on a daily basis allows a lot of supposed "allies" to go about their day being aphobic while comforted about how inclusive they are.
It also allows them to ignore aphobia irl, not just in online spaces, because they never "see" aphobia. They don't see it even when it's right in front of them, even when they're agreeing and giggling over it, even when it's pointed out to them.