Why should I when I have been watching your video for no more than a mere 5 seconds?

Why should I like your video just because you told me to?

Why do I have to waste my time by watching you telling me to subscribe to your channel when instead you could spend the attention you received from your viewers by providing quality content?

Why should I subscribe if I haven't finished your video?

I'm not going to subscribe just because you told me to. I'm not.