Hello, I want to ask for help. I want to write an English composition of sending short messages in groups on holidays, and I want to clarify the phenomenon and explain the reasons.

Nowadays, more and more people plan to send blessings by sending short messages in groups during festivals. The reasons for this phenomenon are as follows: it is convenient for people to do so, especially when one has many friends. As far as I'm concerned, I don't think this is a good way to express my blessing to my friends, because when many people receive the same blessing from the same person, they may think you are insincere.