Is taking a marksman botlane actually unhealthy for the meta?

Now I understand that virtually every game there are 2 adc's bot in ranked, aside from Ziggs. But it's not because it's the safest thing to do? Nooo, no it's not, is it? It's because it's the greediest!

If an ad gets fed and their team takes bot tower and dragon first, then their team wins! It's almost an actual guarantee right now! Also, even though if the marksmen doesn't get fed and they don't feed then there's no harm no foul, if a marksman loses in a duo lane there's nothing they can do! The game practically becomes a 4v5; they are absolutely worthless until they are fed multiple kills on a silver platter.

Now what if mages like were sent bot all the time instead of marksmen, or beefy melees that are strong in duo lanes for that matter? Either way, that botlane composition might actually be able to survive or even win a 3 or 4-man tower dive. This meta involves diving botlane and then taking dragon and tower for the win, right? If that were no longer a consistent way to win, League of Legends would become less frantic and much more interesting to watch! It might slow the game down, sure, but it would certainly prevent early wins and losses that would happen regardless of input from 2~3 members of a team.

That would be healthier for League of Legends. I really hope that if the players can't make it work, Riot throws them a bone here! I am sick of seeing AD carries botlane, in general to be quite honest; not just or . It's a distaste I've now developed for all of them. They're big boys and girls now; they can jungle for all I care.