Yes, it's not perfect but it's something at least and you get a choice. Atm, it's really not ok. Sure it sounds silly, but it happens. I did in that game, and I had others on my side and opposition.
I don't know why there is resistance and negativity about this and people find it ok for a game to be doomed by a simple mistake, yet they constantly complain about snowballing. Doesn't it sound a little hypocritical?
I get, you should pay attention first hand, but then again to be force lose a game for a simple mistake it's kinda harsh don't you think? And look, if me or the person who forgets smite is the only one punished by LP lose, you could say is a retribution. But should the team suffer? Should we add already to toxicity in this game or try to fix things?