As opposed to relying on what? If a new player comes into the game suspecting to play competitively, it'd probably be worth knowing which characters on the roster will get them the best mileage. There are no fundamentals you'll learn with a low-tier that wont carry over to a high-tier.
Initially, I was going to remain silent but this line caught me. Nice work!
"As opposed to relying on what?" You cannot be serious. Let me ask you something... Why did you choose Link and Shulk as your mains over maining Little Mac, Sheik, Rosalina or Diddy (Pre-Patch)? At that time, they will give you the best mileage over Link and Shulk. Heck, Shulk was "low enough" to get a buff when the Wii U came out.
Do you remember in the Demo when everyone thought Megaman/Pikachu were terrible?
Look. When new players comes to Smash, they first get a grasp on the characters and find the ones they like/enjoy, fits their play style. If they want to get competitive, they will look up videos on this say character or go to discussion sites to discover techs for this character (My secondary is Swordfighter so don't come to me about not having something). Then go to local tournaments and test themselves along the mass. If they lose, then they reflect on what happen, comes back to the discussion sites and ask their fellow peers about the matchups. They get advice, improve, and maybe just maybe they win the tournament next time. Of course, that will be a perfect world.
I don't hate the tier list - it is part of competitive metagame. It is essential for its growth. It helps list the general advantage and disadvantage characters have all together. Its a cheat sheet for matchups. However, learning what to do in matchup is more important than using a character that has massive advantage in the matchup. Especially if you going to use "tier list is for new players who want to get competitive" line. I find this statement silly.