Re: why are players allowed as long as they like to make a challenge ??
Partly because the umpire should be over-ruling some of the calls instead of forcing the players to challenge every one of them. It's the umpire's responsibility to do so, and if he/she can't and puts the onus back on the players, the players have the right to make sure of their decisions before challenging.
Ultimately, it still comes down to the umpires being increasingly hopeless and gutless and reliant on the technology. That's just my opinion, of course.
A single flow'r he sent me, since we met./All tenderly his messenger he chose;
Deep-hearted, pure, with scented dew still wet - One perfect rose.
I knew the language of the floweret;/'My fragile leaves,' it said, 'his heart enclose.'
Love long has taken for his amulet/One perfect rose.
Why is it no one ever sent me yet/One perfect limousine, do you suppose?
Ah no, it's always just my luck to get/One perfect rose.