You cannot share closeness, intimacy and trust with hundreds of people at the same time.
The base for strengthening an emotional connection is physical closeness. For any close emotional relation you need to be close physically.
You invite others to celebrate because you want to share your happiness. It makes you happy when others celebrate your happiness together with you. If you are happy but alone, you cannot really enjoy it. When you are sad, too, and someone is there with whom you can share it, your sadness is reduced. You need closeness so that you have somebody to share your happiness and sadness.
Love cannot grow if you don’t have closeness. Sometimes it is very hard to get close to someone. Sometimes there is physical closeness but no closeness of the heart, sometimes the mind is close but nothing else. You cannot establish a strong relationship if you don’t accept full closeness.