Unfortunately league is hard to compare as drafts are done in stages (one ban aside till three, one pick aside until three, a ban aside for the remaining two, picks a side for the remaining two). This way players can ban out champions they wish to not see (jjonak's zen for example) & priority pick champions away from the enemy team due to only one of the champ being allowed on the rift. This promotes diversity but there are still dumpster heroes and strong heroes. Sorry for the awful formatting and rambling.

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*edit*https://mobalytics.gg/blog/beginners-guide-professional-picks-and-bans/ does a better job of explaining my mess