Struggle is good. Consider a tree who receives water at the base of it's trunk regularly...it's roots will remain near the water source. Water a different tree further away and in random spots and the roots must branch out in search of water. Which tree would you rather have in a storm (a tree whose roots are in 1 place or a tree whose roots are spread out)?
Beach is full of struggle. And if you can ascribe to a growth methodology, you'll understand that struggle is code for learning. There's plenty of "learning" (struggle) on the beach:
1. Struggle through the sand on every play. It's no secret that sand training makes your legs struggle to move faster and quicker. Legs will get tired & fatigued faster....producing more growth.
2. Struggle through the elements: sun, wind, sand, etc. It's been said that highly successful people are that way because of their ability to hold their attention on one thing. Beach improves attention by trying to get you to focus on the wind, sun, sand.
3. Struggle through your weakest skill. If you're weakest skill on the team is passing, then the other team will send you most of the serves. If it's setting, they'll serve the other guy to make you set. If you're struggling at a skill, the other team will give you lots of practice until you improve it.
4. Struggle through your strategies & tactics. There's no coach out there telling you to direct who to serve or where to dig. You must learn the game. Your beach coach is only there to guide....
If it's easy, you're not learning. Makes me think back to my spelling quizzes when i would be proud of a 9/10. If i was really learning, i'd be scoring 4/6 out of 10.
Please note, there's a huge difference between struggle and deep struggle (nearly impossible).