But if your coworker says "yes, please!" to the company's free Thanksgiving turkeys and Christmas hams and cheap T-shirts with company logos and subsidized health care and retirement plan and such - that's their choice.
Are the prices and quality at market norms or are you paying back your wages for extra profit to your employer?
That's a lot of eggs in one basket.
When shit hits the fan, you will suddenly hope they become part of your personal life. It is only in a relatively high trust society with a mostly working police/court/government that you can afford to exclude your neighbors from your personal life.
My parents taught me a saying from their native language that translates to the people physically closest to you are your closest family. They are going to be the ones who can help you in times of need (or harm you), so building and maintaining relationships with them is advisable.
That's not the same as being emotionally isolated. You still (presumably) have friends and family.