You are not in LCS; you dont always have to take teleport in a solo lane
LCS teams do that because they have great communication and calls for rotations, etc.
You playing in solo Q have none of that. So when you take a champ that is kinda dependent on snowballing and you take teleport because "hurdur, LCS does it" you are hurting everyone on your team.
Because now that snowbally champ that you picked has 0 lane pressure, you don't snowball and now your team is basically playing a man down.