SEAL team 4 was supposed to be their OP-FOR. So I imagine, they assumed that they would dress up Team 4 with black Arab pajamas and maybe a helmet and some shitty NODs. When they saw that SEAL team 4 was fully kitted out in Panos and top level gear and probably Multicam, they were like
"Oh God, this is a fair fight, I'm not used to this.
" and that was a lesson I imagine their trainers thought they needed to learn.
Hell, even if it's fake, I can buy 3D-printed Panos to fool people. If that's all going to take to mess up Delta, then why wouldn't the enemy do it. Even if they have bad NODs, you don't own the night like it's 2005.
If civilians can get Gucci gear, and you are training to fight Russians or whoever, they might have expensive gear as well, and don't underestimate the enemy or think they might look one way. Be ready to fight tough troops and adapt. And the Delta said, "That [the experience of fighting Team 4 fully kitted] messed us up a couple of times." Meaning they lost quite a lot.