Yes. Burrow isn't going to make you win a game. I'm really tired of people just going "LOLOL JUST NYDUS GUYS" It's not that easy. Okay, you get a flank on them, but it really doesn't matter since they are all clumped up in a ball and on these maps your just splitting up your army to die in the linear pathways. That's if you even make it to nydus.
I'm just really tired of all the people that go, oh guys just use burrow/nydus you win ez pz! Okay, then you go try it in game in high/mid diamond and see how well that plays out.
Also, your friend being 20 diamond; I'm talking about ranking as in points, high diamond is around 1800+ points, mid around 1200. The ranking like #1, #10 etc is dependent on your league, so you can get into a new league and be #1 with around 800 points.
The game is a lot more complex then just use nydus or burrow.
There is a ton of statistical evidence showing zerg is UP, and pretty much every zerg pro agrees.
Mid diamond ~1100
Are you kidding??? Flanking is huge as zerg. Even if its linear you have 2 places to attack. Maximizing your dps. If you can surround them totally thats even better.
Terrans are greedy so they mostly mule, so when they stim, burrow, and it basically wastes the stim and keeps your army alive. If they scan that could be a problem, but its worth a chance to do. Have you thought of that?
I know the game is complex and simple things like saying, use burrow is useless. But saying use burrow to survive a stim slaughter? That could be useful. It's almost like blinking away when they stim up.
I'm not saying I'm a good zerg player. People who are good can use these small things to their advantage. Good players can put these tactics into their builds without screwing up as much.
Try new things, don't focus on just using burrow the whole game. Incorporate it into the strategy.
What about burrow and nydus? Have you thought of combining those two? nydus behind enemies with half roaches and burrow towards them. Sure its a basic tactic, might not work, but with some refining to it, new things could come out.
Nydusing to opponents main is a crap idea. Nydusing around the whole map is a great idea. sure its basic, and needs refining, but its a start for a strategy.
Remember when zerg players started to say "Thors are so OP vs mutas." Then someone discovered the magic box, and suddenly, thors aren't as scary. That's something noone knew about until they started trying new things.
I am just tired of seeing games where zerg encounters a wall, spends his money trying to bust it and losing.
I love games where zerg encounters a wall, expands a bunch, and win in the late game.
Don't hinder progress of the game. There are lots of terran players and that means there are a lot of chances for them to experiment and come up with strategies. Telling others that zerg is UP makes people not want to play it. Thus, hindering progress. They are only UP because people follow what everyone else is doing with them.