Remake time period doesn't give people enough time to reboot their computers if they need to
Also the league client has 2 separate things for game and for the queue client, so if there's something wrong with your game part of the client you won't even realize it until you are already loading and are encountering problems. For example I just got a new computer, and the client was working fine but I just couldn't load into the game and I tried to switch to my laptop but remake got me first. The client did not give me a single sign that there would be problems running the game, and my specs are all within the LoL recommended specs.
In Dota the champ select is in the same client as the game, so if there's problems you'll find out before champ select and can therefore dodge. Why can't it be like that in LoL?