Does Scrims matter?

Title. But everytime when I look at some leaked scrims the teams that are losing ends up wining in actual matches.
And also can someone explain why it says 14-5 sometimes, i thought its first to 13

i think they turn off first to 13 and it matters in the sense that you can drill your execs against functional teams

Scrims are important because they allow you to test comps, try to find flaws in them, work on synergy in match environments, etc.
Also in the settings for customs you can enable Play Out All Rounds, which means you play all 24 rounds before either the game ends or you go to OT

I guess it is because otherwise you will never get to impose your ideas. Scrim is basically your average practice session. But the results don't mean as much as the time they spend practicing does.

Teams practice full-retake, differen't style executes. In most scrims its not a match realistic game,

scrims are where you test stuff out so if things doesn't work then you get shit on. but if a team does consistently poor in it, then sure, it can probably be telling that smth is wrong. also, scrims are first to 24.