Call it nostalgia, but I miss the days when players were dropped for missing tackles.
You are assuming that the potential replacements could tackle better than the one dropped.
In nostalgic times, there was no smart phone to capture and broadcast every silly moment.
30 years ago it would have gone like this:
Scene: Players Motel Room at 3am after a big night on the grog:
Unknown player: hey Kurtley, Look at this magazine that my mate got from Fyshwick. Check out this picture of the fat chick with the bow and arrow.
KB (Kurtley Beale): Maaaate. She looks horrible. There is no way I'd want to do the deed with her.
Unknown: Yep. You're right. Me neither.
KB (Kurtley Beale): d'ja reckon that Di looks like that in the sack?
Unknown: Yuck. Eeeeeewwweeek. <nervous laugh> That's a horrible thought. I'm not going to be able to sleep now.
KB (Kurtley Beale): Yeah, She's a real rotter. Can't believe that we now have to fill in all these forms to account for our expenses we claim. Never had to do that when <previous manager> was in charge. I hate that stuff. Hey, get me that pen. <writes name of manager on the page>.
Unknown. That's funny. Yeah, Nah <insert player name> and <insert player name> are really cranky with her as well. I reckon I'll show them the picture of the archer as well.
Players eventually go to sleep and forget all about the discussion.
The Fyshwick magazine is found discarded in the hotel room by the Hotel Cleaners and handed to the Team Manager as lost property, along with several other items of clothing, and a couple of mouthguards. Team manager throws magazine away.
(actual language used may have been slightly more colourful than that above)
In the "good old days", crap was said at the bar and in private conversations. There was no permanent record kept of that conversation. No one felt the need to tell the world what a pr!ck someone else was, and if they did, there wasn't the means of economically doing so available to the individual. Sending out 300000 individually addressed and produced letters through the Australia Post was expensive, and time consuming.
The only ones with camera's were geeks and they waited until all 24 or 36 carefully posed photographs on the roll of film were taken before taking the roll to the chemist to get developed. You got the photos a week later. It cost money. If you were smart you got 2 for 1 photos, so you had a spare copy to give to 1 friend.