And clubs walking away from another for setting unfair valuations on their wantaway players has happened time and time again also. We've done that countless times when clubs like yours just see us as a blank check.
I think you're underestimating how bad this looks outside of your Spurs tinted glasses. Modric said in his autobiography Levy went back on verbal promises of allowing him to leave the club for one in the CL multiple times, and said as much recently also apparently, in the context of Kane. Levy has previous for this with several players.
It sets a terrible precedent. If you're a promising young player in Europe, why would you join Spurs? If you become a huge success, make it with them, and they reach a level competing for titles, it all works out and everyone's happy. In the event it doesn't, which as we've seen is much more likely, that player will be denied moves away when he realises his potential and Spurs don't.
This is why you were snubbed by Pau Torres, even after agreeing a fee with Villareal. Why would he join?
You're cutting your nose off to spite your face and you think it's benefitting you in the long run. Clueless. Letting ego and pride blind you, frankly.