Yo why is everyone mad about fusing in raids?

I mean, 99% it's people who just wanna get that extra buff, see that nice animation and then RR just like our saviour Toshi taught, wasting you like... 5 seconds? I didn't get the fusions but I mean, I don't mind that and I don't see why it's something ad hated and spoke about as Cryhan💀 I'm sure it's not those extra 5 seconds that will make you miss some precious CCs, so chill