Re: metaverse, it's not really a handwavey after thought - they've been investing quite significantly ($10bn lost last year alone while all of Google's bets including deepmind and waymo lost ~1.45bn. >10k people working on it now AFAIK).
I think Facebook just got burned by not having a hardware platform this cycle - Apple and Google control the phones and Microsoft has the PC, XBox etc. They just want control over the next big hardware platform.
Whether that's a reasonable bet or not who knows? But I wouldn't be as dismissive of their ambitions in the space.