Metal fucking sucks, “indie” music fucking sucks
Indie can be alt j, arcade fire, but it can also be pixies, the smiths, radiohead and so so many others.
If I think eletro I think pop shitty eletro like david gueta, calvin harris, but I kinda like eletro subgenres like synthwave/retro/vapor...
When I think of emo I think MCR, Panic at the disco and paramore which isn't my alley, but I'm glad I took a deep dive and found mathrock and midwest emo cause I fucking love some bands from that sub-subgenre.
Music is fluid and rich as hell, a band can take strong inspiration from a fuckton of different genres at once, and then be the inspiration to a hundred others.
Genre terms are there to help, help locating or give vague ideas of what to expect. Of course you can use them to broadly talk shit but it's hard to respect the take.
edit:gramma