Or you could... ya know, actually play the game the way that was intended? I get that people want customs now but playing each char for like 45 minutes to an hour really helps you learn about what you need to be aware of in general. All star mode on hard gets you the customs for the character you're playing as a lot easier.
None of the single player modes actually help you learn your character properly though. Classic has items and a general knockback buff on your character, All-Star has the same knockback alteration because of all the characters you have to fight. Don't even get me started on Master Orders and Crazy Orders. You can't properly learn your character when there are alterarions made around them. That's what Training Mode is for; to leaen your character without screwy modifications.
If we want to exploit a way to mitigate the nonsense of randon drops in a game that should not realistically have them (MMO style games fine but not a competitive fighting game), we have a right as the owner of the game to exploit it.
Also personally there are several characters I don't like to use but want their customs for when friends come over. Is it a bad thing to want to avoid using characters I don't like in a game I want to enjoy to the fullest, while simultaneously providing extra choices for my friends?
Different strokes, my friend.