Why would you want to go all in on a hand like that? Under the gun, a pair of 6...A raise is sensible but all in? Doesn't make any sense to me.
There is a lot of context missing here.
We don't know what kind of stakes for a start.
We don't know the stage of the tourney
We dopn't have ANY intel on the players.
You may not agree with the play. but saying it doesn't make ANY sense is a bridge too far.
If I was up against people shoving Ace-rag all day long, sure I'd call a shove with pocket sixes.
If I was playing afreeroll that I got into late, sat down and have 66...sure, I might occasionally find a shove call.
Poker players need to STOP thinking there is only one correct action.
There are lots of situations...there are lots of players...there are lots of different combinations of how the cards may fall.
You are more likely to win at poker if you do play the percentages properly...but just like other sports, on the day, the best don't always win. Sometimes s/he who dares, wins.
At the end of the day, calling the shove might not have been my play either...but I think it is disingenuous to say it 'doesn't amke any sense'.