Do most players use hacked Pokemon?

[Apo]

as @Justin pointed out, Legendaries are a problem.

I don't agree with breeding taking that much time for competitive play, even more when I plan to work in E-sport, my vision is really toward the competive aspect. But comparing breeding a normal Pokemon vs Soft Reseting to get a Legendary with the right Nature + the right IVs...

Maybe the company doesn't want the game to be competitive (like Smash Bros) but then why do they organize World Championships?

I feel like they should either ban all legendaries (not only the new tier) from competitive play, or change the whole system. Like, by doing special things/quests you should be able to change the nature of a Pokemon (like in real life, you can be timid but you might change). and maybe change the IVs system