as somebody who has done champs like
4 times
there is most certainly an amount of showboating that is helpful
it’s also true that people who fall too far into CHS tend to flame out and not advance
in general I think showboating is probably much more favored by the votes than by jury in quals
but in semis the votes tend to all be from players who can usually do a good job making relatively objective votes so it doesn’t do much (and can easily actively hurt if you’re wrong or rub people the wrong way)
just my two cents