Again, it's not as bad as you're painting it. It's not that the players are arguing all the time, every time. No one is being unreasonable. That's the thing, no one has to be unreasonable here because, as you say, the rules are open ended. Which means that the players are going to gravitate towards trying to do stuff outside of the box. Not every time. Of course not. Just often enough that it becomes a thing the DM has to deal with.
And, it's not like it's just one spell. It's the fifty or so spells that are in the PHB. So, you spend a couple of years hammering off the rough edges with your group. Great. But, then Dave moves away and Jeff gets a job, so, now you have two new players at your table and you get to start having the same conversations all over again. Then, the year after that, another splatbook drops, dropping another dozen or so vaguely written spell effects onto the group and you spend time every session or two hammering the rough edges off those books. Then, six months later, Peter gets a new job and you're looking for another player which means you get to have the same conversation about the fifty PHB spells plus the dozen splatbook spells all over again. By now, you've finished that campaign, whatever it was, and you're starting up a new one. But two of your players have moved on and now the five people sitting at your table are completely different thant the five you had at the beginning.
Which means you get to hammer the rough edges off those vaguely worded spell yet again.