Oh sure, it's definitely a strength. Abadango for example has tricks for days and he got a lot of wins at Apex.
Their biggest problem is probably that we just watch their videos and steal the best stuff for ourselves. Borrowing tech is very easy in Smash Bros compared to something like Street Fighter 4.
No kidding, have you seen the cookie cutter Diddys, Ness, Luigis, Sheiks, Rosalinas, ZSS, Foxes, and... Everyone? Well, almost everyone.
You could watch anyone and pick up something, but the more crazy and more precision stuff like is more difficult. That adding in with simple, effective combos makes a fantastic player. Being able to do wacky things and having fundamentals and bread and butter combos means someone could have an answer for any situation.
It's sort of why I feel like people can play against Diddys even with bad matchup, but the creative Diddys will destroy. Everyone knows about his D-throw and Uair, but when Diddy mixes up with U-throw, Dtilt, etc., it gets dangerous.