I say this as someone who does BJJ
>Most BJJ guys have shit takedowns -> some places don't even drill takedowns
>If you are a smaller person fighting a bigger person, being in closed guard = you will get slammed
>Too much focus on submissions, not enough focus on topside control and pins
>Most BJJ guys are in fact total pussies and cry if you throw them a bit too hard
If you want to take a grappling art which is more realistic for fights take wrestling or judo. Just lol if you aren't learning any standup grappling and claim you can defend yourself. In a street fight you aren't going to be fighting people your size, sitting in closed guard will get you slammed and will either injure you or force you to break your guard.