Hitesh portfolio

I agree, that long term holdings create value.
But can you elaborate on why swing shouldn’t be considered.
I’m asking to learn for personal basis.
My thoughts process is find a good stock, fundamentally good.
Enter at right time(easier said than done).
I exit when my stock reaches 15% unrealised. This usually, looking at the trend of my pickings happens at min 2 weeks to 2 months at max.
Anualize my returns, it is very good and substantial.

So why stay in the game for long run.

I do know there is value to being in the game in the long run. But to me swing outshines it.
Let me know the other side of this.