There was a leaf that hung high on a tree. Every day, it would look up and watch the birds fly by. The leaf also wanted to fly. Why did it need to be tied down to the tree? Hashem heard the leaf's prayer and allowed the leaf to break off from the tree. The leaf joyously tossed around in the wind and swiveled through the air. But then it fell to the ground, dried up, and perished. The leaf discovered it was better to be tied down to the tree.
Let this remind us that freedom can seem full of joy, but sometimes, being "tied down" is our source of life. A bachur in yeshiva is tied down and bound to the rules and regulations that the yeshiva sets down. He can't come and go when he desires, he can't choose when he wants to learn and when he wants to socialize, he can't dress as he wants, and so on. He is in a system and has to follow the rules, which might be hard for him. He doesn’t have "freedom" to do as he pleases.
But what is the alternative? The yeshiva is his life source. It is the place where he is protected from the outdoor, negative influences. It is the place where he can grow in Torah knowledge and dwell among G-d fearing friends. It might be hard to feel tied down, but the alternative is far worse. Think about the leaf, how happy it felt when it broke off from the tree, but how long did that joy last?
When you sift flour, the thin particles fall through the grid, and the rougher, thicker chunks are held above. The flour that fell through might feel jealous of its few friends that are still free, above the grid. It wishes to be like them. But soon, those "free" kernels will be tossed into the garbage, while the thin flour will become a delicious, beautiful cake. To be free isn't always the primary criterion a person should seek because being tied down has many benefits.
There are responsibilities in life. Holding a job might mean obeying a boss, coming on time, and performing well. Being married also comes with its responsibilities. But these responsibilities give us life! Life would be meaningless without these obligations. Keeping the Torah is also a responsibility. We don't have the freedom to act as we want to. But it isn't stifling, chas v'shalom. It is our life-source.