I`m confused. Why would Burt be an option at fullback if he can`t tackle, take bombs or run from dummy-half (all of which he can do by the way)?
Fullbacks usually don't concede tries through missed tackles because they usually face two or three on one - even if they make the tackle the try is usually scored. OTOH, a miss on the wing is a one-on-one f**kup that nearly always leads to a linebreak and often a try. Not only that but a small winger on his line can go low, make the tackle and still concede the try. They need to either wrap up the ball or drive the attacker back.
As for taking bombs, you want that from any fullback but you can forgive its lack if he's good in other areas (e.g. Barba at Canterbury). At least a fullback gets plenty of cover (or he should) when he's bombed, unlike wingers who are usually fairly isolated under the high ball.
As for running from dummy half, any player who is good at it should do it, but given how little they have to do in defence, the wingers' main job is to run the ball as much as they can, especially on exit sets.
Here are some numbers from a few wingers' most recent games (at wing):
Uate 18 runs (328 metres)
Talanoa 17 runs (149 metres)
Morris 13 runs (200 metres)
Nightingale 14 runs (148 metres)
Inu 14 runs (136 metres)
Faifai Loa 18 runs (131 metres)
The last time Burt played wing was against Canberra:
Burt 7 runs (55 metres)
In the same game our other winger contributed thusly:
Atkins 15 runs (120 metres)
Burt's previous games on the wing:
vs Manly 6 runs (73 metres)
vs Illawarra 13 runs (79 metres)
vs Newcastle 7 runs (69 metres)
vs Cronulla 10 runs (127 metres)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
vs N. Queensland
4 runs (25 metres)
