I mean, I as well have been harassed in person by geese, and am not just entirely pulling what I am saying out of my ass, but you don't seem to either fundamentally agree with the feasibility of grabbing a goose, blocking attacks from a goose, or you don't want to entertain the hypotheticals.

You just assert a goose up in your face will cause you to close your eyes and panic... I dispute this.

You say you'e done jujutsu, I've fought a lot of people in katate kumite bouts... who have made use of similar attacks against the face, or just feints and misdirects, to take advantage of your reflex to close your eyese and wince... I've done this against other people as well... you learn to suppress that instinct to flinch, you learn when to duck and dodge and block, and alway, always, keep your eyes on your opponent.

Also, I brought up masks because, beyond being a very plausible counter to the goose's technique here, a good deal of katate training and tournament level karate kumite just actually involves full face masks for both combatants, as a safety measure.

...Maybe a whole gander, a pack would overwhelm you, but not a single one, no.

I also never said punching a goose would be an optimal strategy. I said grabbing one by the neck, not actually punching one, with the speed of a tight, light punch, a jab, could work.

You could also just kick them.

I genuienly don't know what you mean by a... full arm swipe?

You mean a haymaker?

I have never heard any martial artist (you said you'd done jujutsu) refer to any kind of formally taught attack with your arm and hand as a 'swipe'...

I've usually heard the term 'swipe' used dismissively or derisively to refer to a sloppy, poor form, unpracticed attack intended to damage via scratching with your nails... which would be silly against a feathered opponent, the feathers would utterly negate this.

I've attempted to look up 'full arm swipe' and:

Do you mean just almost but not quite locking the elblow and using basically a straight arm as in blocking in basketball?

Do you mean the breakdancing manuever called a swipe?