Samsung Galaxy Watch 6 LTE Network Activation - Is it Required?

I did not see this question addressed when I did a search, hope it's not a dupe.

I'm considering purchasing a Galaxy Watch 6 model, haven't decided exactly which one yet though. I looked at the Xfinity Mobile website and dropped by the local Xfinity Store. While discussing things with a rep at the store, I asked if I had to activate the LTE network connection or not. The website simply said "on activation" a $10 monthly connection charge would be aded to my account. He said YES, if I bought the Watch 6 thru Xfinity it was REQUIRED to activate the LTE network connection, and if I did not want to pay the extra $10 a month, I had to purchase the Watch 6 elsewhere.

So, if I want to give Xfinty business and buy a Watch 6 thru you, and even if I ONLY want to use it thru my phone via Bluetooth, I still have to give you $10 a month or $120 a year!?

Question: If I buy a Watch 6 thru Xfinity, is LTE network activation actually required? And if so, WHY?