The Scottish government were certainly wrong to give the greenlight as it turns out but they were (supposedly) asked about a training trip which was permitted at the time. You can argue it's not their place to judge how sport professionals should train - ie the madness of squeezing it in between games - only whether the request strictly meets the rules or not.

Celtic, given how things then turned in the couple of months since getting approval, should certainly have had the sense to cancel it.

Not that I believe in the sort of reconstruction that's feasible in Scotland but if ever there was time to consider changes it'd be now - no one is relegated, no one is promoted (the Championship season certainly couldn't be called after less than a dozen games) so there is no perception of doing things to benefit one club or other. Somehow I suspect there will be little interest in doing so!