That depends on the person, but in most cases wifi limits the true potential of what a player can really do as a result we avoid having to differentiate who plays well online and who doesn't by just having it in IRL.
Also we're critiquing you, so we don't care if you gained anything from that wifi match or not just that if you made a mistake such as poor spacing, we wouldn't be able to tell if you normally would make that mistake or if it is something that resulted from even the smallest bit of lag. And yes I'm being extremely technical but if you want the best critique than you should not factor out even the smallest factors, such as minimal lag.
Edit: Basically just post an IRL video since its more reliable, and I won't deny however it is that won the IRL thing or any others that have been successful along with online play, but IRL vids just avoid a lot of pointless talking.