I don't think they forgot about 9/11, there is just no need to be there. It has been 22 years, I don't need the president to show up every year for a kumbaya moment. He has other more important duties.
The country doesn't function based on your needs.
Biden is the first P/Resident since 9-11 to be absent from either the NYC memorial or the WH on the anniversary.
There were almost 3,000 people murdered that day. That doesn't include the tens of thousands whose health was impacted from the air at Ground Zero.
Think about how many family members, friends, lovers, co-workers and acquaintances that number represents.
I lost a co-worker and a dozen acquaintances at the Pentagon that day. I spent a month in Hawaii plus 3 weeks in Virginia helping to recover the computer data lost in the Chief of Naval Operations command center as well as setting up uff-site backups to prevent such losses in the future. That involved setting up a mirror of the database servers in an underground facility nearby (Dick Cheney's "undisclosed location").
Some of us have a direct link to the carnage of that day and were deeply involved in what came after -- including the wars in Iraq and Afghanistan.
Maybe if you experienced loss from that day or served in the military in the Gulf, you would expect the P/Resident and Commander in Chief to "never forget".
It's a shame there are people like you. A whole generation has been born and become adults after the attacks. They never experienced the horror of that day, nor the unending wars that ensued. If you're telling them remembering the fallen and studying the event no longer matters, then we are absolutely destined fo see another 9-11 on US soil. It's just a matter of time.