(It looks right but why TF doesn't it work?!!?!?)
Because the pfSense LAN IP is not a gateway from pfSense to anywhere. A "gateway" in network terms is an IP address on another box, that gets you closer to other destination subnets.
If you set it to yourself, then packets can go into a bit of an infinite spin, and exhuast their TTL.
When you have other private subnets behind LAN, you could, in principle, have pfSense LAN gateway set to the other router on LAN that gets you to those "back-end" subnets. But pfSense does not need that to be done.
I think the real problem that blows it all up is selecting LAN gateway as "default gateway" (or when pfSense kindly does that for you without you realising).
In any case, on pfSense never set a gateway on a LAN-style interface.