Yes, this is 128000287725th topic about hating on stryde-sniper. Don't be surprised.
Anyway, reason is simple:
Back in the day, when PB2 was a popular game, there were people like Reject who were creating beautiful creative impressive maps of that time. Other creative map makers were inspired by guys like him and started their own map making career and improved even further! Thats how progress works: one guy makes something beautiful and others try to surpass him by making something even better. They were motivated and pushed the creativity train up to this day and place. This is one of the reasons why map making and PB2 were alive for so long - people had things to do and tried to become #1 map maker.
Now, what will happen if you start approving maps like stryde-sniper in PB3:
Map making community creativity and map quality will regress. There will be less people to join the race and improve. People will play the same map 24/7 therefore making ranking segment of MP less popular and filled (like what we had in PB2 before game completely died). You will have one more reason to not play PB3 and leave because the game won't impress you more than PB2 did in time.
Think about it.