If its impossible to experience the whole content the game has to offer, yes. Otherwise, no.
I am thinking of it like a sweater. If theres a defect on the fabric, you should be able to trade it in for a new one or get your money back.
In games, this would translate to how intrusive the bugs are. Missing faces? Definitly intrusive. Falling to the grounf and respawning back at the checkpoint but works next time? Its ok. Basically, if the intrusiveness is consistant, it should warrant a refund because the product does not do what its suppose to and therefore its defective.







