Sampling almost by definition is a shortcut, that's the whole point, you 'sample' so that you don't need to create it yourself.
Using a sample of a professionally recorded piece of music means your output benefits from all the work put into that piece from the musicians and the engineers involved. Why would you sample it otherwise?
If someone like Howlett wanted to achieve a similar result in one of his tracks without sampling he would have to spend years learning all the required instruments, perform it himself and then spend years learning how to mix records to a high standard and give each recording a unique flavor soundwise. The other option is he hire some musicians and engineers to play/mix it for him, who themselves would have spent years learning their craft.
So on a scale of one to ten what's easier? Spending years mastering two disciplines? Or spending minutes recording a clip of someone else's music then a few more minutes rearranging it in your own track?
I'm not knocking it as I said before, just being honest about the amount of work involved, but people have a tendency to exaggerate the amount of skill behind sampling like it's this mysterious dark art and it's usually coupled with a weird reverence similar to people who worship DJs.
Like this dude in the comments of the vid you linked to:
Okay bro calm down f*ckin' hell, a couple of his later albums weren't so well received.For me Liam (Howlett) is up there with any of the greatest composers of all time past and present.
