the whole point of the bot lane strat is for two purposes
1-you have two people defending drake, that is why we have two bot lane and not in top lane
2-A long range character who scales very well who does lots of damage is a very safe idea to invest in.
having long range makes you hard to kill for assuming if your team is protecting you properly, you will be doing safe, high dps
having only mellee carries on your team has a high risk of being poked out by teams who do have range, they also have a very bad siege, for it is much easier to kill the melle range mord who is hitting your tower, than the long range rocket jinx or sniper caitlyn
Anything can work, but a meta exists for a reason.
Most, effective, tactic, available