It's like crossfit breh, it might work but there is an unnecessary risk of injury when other things can be done instead. Forearms are powerful and can hold up to repeated training, but wrists are weak. Wrists don't become super muscular and resistant to injury. Wrists are frail joints and are critical to 95% of weight training so why would you do an incredibly unnatural, stressful movement like a wrist curl and risk straining them?
There aint no if's and's or but's about it my forearms have grown EXPONENTIALLY since i started lifting and part of that is from the individual work i do with my forearms. Im not saying go out and do 100 wrist curls or no dumb shyt like that; my workouts follows this form :Compound exercises >>> isolation exercises with the smallest muscles coming last, and your wrists will never be super muscular because they aren't made of muscle, they're made of bones/tendons/ligaments, it'd be like trying to work out your ankles. We're lifting heavy ass weights and putting them back down, there's a chance of injury with any movement you do. I perform all my exercises safely so to minimize any chance of injury as anybody should do and besides the vast majority of workout injuries come from over training something i will never let happen because i listen to my body.
And yes, I said minimal gains. Forearms are possibly the most genetically locked features for bodybuilding, dudes can work them for years and not reap the benefits that they technically should be achieving. Calves are the same way. If you have the genetics to have big forearms, they will get plenty of work with the things mentioned (deadlifts no straps, shrugs, pullups, rows).
sounds like those excuses i hear from others who cry about not getting their calves to grow, nah these nikkas just aint hittin that muscle hard enough. they not focused on the mind/muscle connection and i couldn't care less what's most "genetically locked" because I haven't hit any plateaus and they continue to grow steadily to this day. I do forearm curls and whatever at the end of my workout the same way i hit a few sets of pushups at the end of my chest/tri workout to squeeze out every last ounce of strength i have left. i aint disagreeing with you but thats personally what i do because the goal is to tear as many muscle fibers as possible and this is what works best FOR ME.
You don't find it odd that virtually any advanced weight routine you will find does NOT include wrist curls? After all, forearms are often the most highly visible part of any bodybuilder, so wouldn't the forearms be a key point of emphasis? The reason you don't see them is because, like was previously stated, they are noob exercises--to be blunt.
You wanna know why i dont care about their advanced routines? Because i ain't them and they ain't me. I don't squat anymore because i tore every ligament in my left ankle and can't get the stretch necessary but i still have some of the strongest legs pound for pound you'll see outta most gymgoers. I've had people's eyes pop out of their head when i say i only weigh "about" 150 because they constantly think im no less then 170+ This is what i look like at 145-150 lbs about a month ago you wanna tell me i'm doing it wrong?