Watch pairing with tablets

[Cyberflake]

My son has a Samsung Galaxy Tablet A8 LTE. I bought him a Samsung Watch 4 LTE eSIM. But the Samsung Wear does not pick up the Watch. Instead of him taking a tablet to school(sports) to make/receive phone calls, he would be better off having the watch, which is practicle. But then I researched online and it appears for an unknown reason, Samsung blocks pairing the watches with tablets. Why exactly? 

[overgaming]

Are you sure you even allowed to bring that to school

[overgaming]

It can take calls and download apps which is illegal if you write exams and tests.

[Cyberflake]

Yes. School, sport, shops etc.

[overgaming]

Shops I can understand and sports
Samsung prefers if you pair to phone

[Cyberflake]

Why?

[overgaming]

There you go

[Cyberflake]

Why?

[overgaming]

I don't know better support on mobile easier to communicate with device

[overgaming]

Such as watch